#(not a vigilante at all)

[pokeberry5]

boy hostage (spiritual successor to this)

big brother to the rescue:

[greenglowinspooks]

To be honest. DCxDP where the reason Danny meets the bats is Ace the Bat-hound

Like, just think about it for a second. Danny is in Gotham for college, or maybe he just moved out to find a city where having mad scientist parents isn’t actually that unusual.

He can see ghosts.

The ghosts know this.

Now he’s getting harassed left and right by spirits trying to get closure. Fine, whatever, most of them are a one-and-done type deal, and the amount of ghosts trying to get his help steadily decreases.

Except for this one very stubborn dog.

It just keeps showing up and leading him to crime scenes! He doesn’t know how many “anonymous tips” he can call in to the cops before they trace his phone! And this dog, this incredibly good boy, will not stop trying to help the city. He’s never met anyone with such a strong sense of justice, let alone a dog. Can dogs even have a moral compass?

And so Danny just accepts the fact that Ace isn’t going anywhere and becomes his reluctant sidekick/dedicated medium. He leans into the whole thing, dressing up in a mix of traditional magic-user attire and accessories that pay homage to the ghost dog.

He becomes somewhat well known. The psychopomp detective following around the shadowy figure of a German Shepard? That’s unusual! That’s weird! I mean, it’s not the weirdest thing in Gotham, sure, but he’s a new vigilante and he’s got a ghost dog that people can only see when it’s around him. Someone’s gonna notice.

Damian, as Robin, is the first to reach out to him.

Ace doesn’t know Damian but he does know a Robin, and while this isn’t his Robin, he’s still friendlier than usual. Danny’s panicking because oh god the bats are here and also is this kid gonna steal my ghost dog, Damian is absolutely delighted by Ace, and Ace is just happy to see a Robin again.

Damian decides that the psychopomp isn’t a danger to anyone, and there’s no reason to put this encounter into his reports, really, and perhaps Danny can help with some of his cases in the future.

Danny is sweating bullets because Damian basically tells him that he’ll keep him secret as long as he gets to play with Ace. Ace is happy that he’s finally getting some bat affiliated crime-fighting assistance.

And so, Danny is now both Ace AND Damian’s reluctant assistant. At least whenever he’s in trouble, he can always call a middle schooler to help him.

(Is Robin even in school? He’s out patrolling damn near every night, and he stays out late as hell. Does he have a bedtime? He should.)

Eventually it gets to the point where Damian is going over to Danny’s house. When he first sees it, he has a damn bitch you live like this moment, to which Danny responds that not everyone has the money to afford a nice place. Damian counters that he could at least take the time to clean up, and Danny replies that he’s working, going to school, and being a vigilante assistant to a ghost dog, something’s got to give.

Danny nearly has a heart attack when he checks his bank account the next day and sees that someone transferred him 10,000 dollars.

And so they get into a routine. Danny and Damian fight crime with Ace at night, and occasionally Damian stops by during the day to play with Ace and have Danny help with his homework.

(Damian is smart enough to do it on his own, but some of the instructions are written incredibly confusingly, and he would never admit to needing help to his family. Danny is just glad that the kid is in school and cares about his education, blissfully unaware that he’s basically emotionally adopted him.)

Damian is used to being in Danny’s company.

Eventually, when going over a case with the family, Damian absentmindedly remarks that he’ll have to ask Danny about some of the clues that they might be missing. Nightwing asks who he means and Damian makes a face like he just swallowed a lemon.

Cue shitstorm.

Who is “Danny?” Why is Damian willing to ask for help from anyone, much less someone outside of the family? Does he know who Damian is? Has Damian been compromised? What the hell is going on?

Damian now has to explain that Danny is the psychopomp with the ghost dog who he might have met hunted down while on patrol and conveniently not mentioned, but he’s not a bad person, really, and he lets him play with Ace, and he’s been quite helpful on certain cases due to his ability to talk to ghosts.

Bruce insists that the family meet Danny. Damian, hoping that he won’t just skip town the second he hears the news, relents.

Danny is surprisingly eager to meet the bats, considering his earlier fears.

Damian, blissfully unaware of what’s coming, sets a time and place to meet.

Once everyone is there, he gives Bruce the earful of a lifetime.

Robin is in middle school! Danny knows that there’s no way to stop the boy from going on patrol, but you could at least shift his schedule so he gets enough sleep on school nights! Does the Bat even know where he is half the time?! (No) And why isn’t he comfortable asking his family for help with both cases and homework? Did they ever even notice how much time he was spending at Danny’s house? If Danny was a bad person, he could have seriously hurt the poor boy! Shame on you!

Nightwing is mortified that Damian didn’t trust him enough to tell him about any of this. Red Hood is laughing his ass off, because yeah Danny is making good points but he’s also chewing out the literal Batman. Tim is recording the whole thing. Steph is delighted by the absolute gall of this Danger Twink™️, and already planning to add him to several groupchats. Damian is more embarrassed than he’s ever been in his entire life.

You, he points to Nightwing, did your academic life feel supported when you were a Robin? Nightwing is too stunned to speak. Red Hood, eternal shit-stirrer, says that oh, we all prioritized patrol over our education, that’s just how it is. Red Robin actually dropped out of high school to avoid distractions, did you know that?

Danny honest-to-god shrieks at this.

He finishes his angry rant and leaves, everyone too stunned to stop him.

And as it turns out, Tim wasn’t the only person recording the whole thing.

The entire internet is blowing up with Psychopomp The Danger Twink™️’s rant. People are taking sides. Things are getting messy. Red Hood literally admitting on-camera to previously being a Robin is somehow not the main focus here.

Eventually someone connects some dots from the video, as well as stories circling the internet about the psychopomp. A ghost dog named Ace, who is the literal only reason that the psychopomp is fighting crime at all, which seems incredibly fond of Nightwing and Robin.

A crime-fighting dog who wants constant attention from both the current and original Robin.

Oh my god, Ace the Bat-hound died and became a crime-fighting ghost.

And, somehow, that’s still not the strangest thing going on in Gotham.

[sleepy-grav3]

Amity Park hates the Justice League but loves Red Hood and sometimes other heroes

A/n: I got this random idea so here it is. Oh, and this is good reveal AU ok?

-------

Due to the Justice League mocking them and ignoring their villain problems that were also publicly interdimensional problems, everyone hates the JL. It got worst with the GIW coming in, who blatantly went against the meta-laws (which included aliens, demons and so much more that weren't human from the beginning). They started to think the Justice League supported them.

In the Infinite Realms, however, there's a revenant that many adored and others respected. He did not hold back against criminals. Criminals that would rape, kill, traffic, sell drugs, and more to people. He especially didn't like when they brought kids into this. He'd avenge people the way they should've been: by promising that their abuser/killer/whatever wouldn't be able to do it again. And in the place they lived in, the only way for that to be possible was by major injury, heavy social outcasting, and/or death. Most prefer the 3rd.

And after how long the Amitians dealt with the attacks which eventually came to a slow once or twice a week type thing, they started opening their minds to the idea of coexistence. Well, further than they had. So when people started to cross over and start making their small haunts in their side of the veil, the Amitian's began to become aware of the popular hero Red Hood. He was part of the undead community, which was trustworthy in everyone's books.

So Amity Park started making merch. Most of it was for Team Phantom, but there was plenty for Red Hood as well. There were other heroes on the side, like for Superboy 1 (who they renamed to Supernova due to their hatred for Superman for 2 reasons, the obvious and that he rejected a mirror-born), and Raven (the half demon).

And with this coexistence, Team Phantom had noticed the positive feedback about killing in the name of vengeance. So they went on the offensive, and after a good year of that, the GIW lost funding for producing no results and just taking up resources. The acts were still there, but nobody enacted them in Amity, and nobody actually knew or believed them outside of the haunted city.

Then the Justice League find out about the hero group there due to tracking merchandise after they started to sell outside of the city. Superman was the guy everyone liked, so he was sent over. He immediately got thrown out and was now questioning who the heck Supernova was and when he rejected him.

Flash? Outcast. Everyone ignored and walked away from him. they had the police, who never did anything or even had to anymore, kick him out.

Green Lanter? Oh the poor guy. He had his ring taken away and thrown out of the city somehow. It took hours to find it.

Wonder Woman, they had to be ok with her. Not at first, but once Phantom had a talk with her and people learned that they were cousins through Clockwork (Kronos) and Pandora, they were ok. ish. Tolerated was the best word and she got the info back to the league.

The batfamily took a trip there, dragging Red Hood along somehow. And right when Red Hood was noticed, a crowd began to form as everyone practically worshipped him. There were many victims he had avenged and an Ancient (Lady Gotham) came and gave him the gifts she couldn't without scaring the guy.

At one point, the poor guy even cried.

[cyanide-sippy-cup]

The idea that Duke is the super well-behaved and rule-following kid is really funny to me cause like, have you read Robin War? His bit in that book opens with him being arrested for wearing red shoes (long story, just know he was also wearing a red hoodie that apparently wasn't a problem) and he explains step by step to the cop exactly how he plans on escaping before executing that escape perfectly by jumping off a bridge. He fought an armored Jim Gordon, the Court of Owls, and Damian who had been manipulated into joining the Court. Duke managed to talk Damian down while getting his ass kicked and then kinda befriended the kid after. He also has defied Batman several times and was proven to be right. All with a healthy dose of sass.

But also I do like lil rule-following sweetheart Duke so I have a proposal. Duke Thomas who follows the rules he agrees with. Most of the time, he's the sweet little angel in the manor. He's polite, he's well-mannered, he's kind, and he does what he's told. However that's only because everything aligns with what he believes to be the right path. The moment Bruce makes a bad call or order, Duke takes it to 11 and becomes more impossible to order around than Jason. Chaotic Good Duke.

[the-witchhunter]

DP x DC: The Dead Man at the Diner

Danny has a hard time maintaining regular jobs. At this point he’s pretty much nocturnal after years of being attacked at night, and possibly just part of his ghostly nature. He’s odd, and a basic google search brings up various news articles about him getting into fist fights with the mayor of a small town. He barely passed high school and college was out of the question, so who in their right mind would hire him?

What’s a job that would work with his odd hours, doesn’t require a college education, and a possible criminal record and a tendency to be ready to throw down is NOT an issue?

Danny is a cook at a 24hour Diner in Gotham

The man just needs to be able to flip a burger and make breakfast food and doesn’t mind a gun in the face because he’s well used to it. So what if the robber was dumb enough to pull that shit next to the fryer. If he didn’t want something to end up extra crispy he should have stayed out of Danny’s kitchen

Just think of all the folks he would meet.

Sure, the vigilantes of the city would be obvious and you can’t tell me spoiler isn’t dragging folks there to eat. Maybe they notice some weird things about the cook, like he doesn’t breath, his eyes reflect light like an animal’s, or the time he accidentally cut off a finger and it was fine the next day, or maybe the time a robber shot him and he just... didn’t react

Something is weird about that guy

And of course the person I think would love a jersey style diner breakfast at all hours: Harley Quinn

Technically she’s not supposed to bring the hyenas in, health code and all that, but everyone else is to freaked out to tell her and Danny doesn’t care. Frankly he spends his break petting them and they like him because he smells like food.

[demaparbat-hp]

Izumi (steambaby) sketches.

[sakuravalelp]

A dream land - DP X DC Prompt

Okay, so I was thinking about that episode "Perchance to dream" where Bruce is trapped in a dream world and this, even thought really different, came to my mind.

Danny is king or prince of the infinite realms. He's been working on personalizing/decorating his castle in the infinite realms. When he feels someone walking just outside the castles walls. The thing is, that someone isn't a denizen, they aren't in a corporeal body, but he can feel that they are very much alive and feel distinctly human. He approaches the person to ask why and how they are in the infinite realms, but they fade away before he gets the opportunity.

Clockwork, who was with him at the moment, tells him that the visitor from the living, was just the soul projection of someone that was sleeping, and then refuses to elaborate further. Since it's something that was to do with sleeping, Danny decides to go and ask Nocturn, it seemed like a reasonable assumption that he was the one at fault for the soul projection.

Contrary to what he thought, Nocturn informed Danny that Sleeping soul projection was a natural phenomenon that he didn't control. The land of dreams, ("My domain" - Nocturn reminds him), was in the infinite realm after all, and those who have been close to death sometimes slipped they're whole soul instead of just their mind, and ended up all over the infinite realms.

It isn't too different from a lucid dream for them, the body gets all the benefit of the sleep, the mind feels rested if they had a good time in the realms. Except, if they hurt their soul too bad during their little trip, it would have real consequences. Loosing memories, abilities regression, migraine, pain that reflects the soul damage, all either temporary until the soul healed, or permanent and deteriorating, and in some occasions finishing in the persons death. In the latter, the soul is usually too damaged and cease it's existence, or have enough ectoplasm and emotion to form into ghosts with crack cores whose existence is instantly in danger.

Danny clearly didn't like the image that was painted to him, so he asked Nocturn if there was really nothing that he could do. It took a lot of talking and convincing, but eventually Nocturn admitted he could be able to direct the soul projecting to appear on a certain place, but he refused to babysit anyone. Which was enough for Danny, all he needed to do was make another expansion in his castle.

He decided to make a garden to receive their soul projecting guests. The garden was enormous, with all kinds of spaced within it. Playgrounds, picnic spaces, soft benches, tables with ghost and space teamed board games, fountains, and of course, the beautiful flowers that surrounded and decorated the place. Once he got ghosts with gardening, protection and caring obsessions on the place to look out for the souls, he was ready to receive them. It took him by surprise the amount of people that came, the garden was never crowded, but was never empty either, and souls of all ages and places were visiting at all times.

He kept expanding the garden as he heard of new things their guests wished for. He enjoyed spending time in the middle of the garden where souls passed by but rarely appeared, it was calm, but not completly quite with the background noice of the soul enjoying their dreams, and he could do the more mundane king/prince work. Until, he starts getting a regular visitor on his little space of the garden.

Choose the DC character you prefer, my idea is for people who hasn't died in the past but has been in the doors of death (so died and came back would be disqualified but you do as you prefer), but I'm going with Tim.

The soul of a boy around his age appears just in front of him, as usual when he greets new arriving soul, he welcomes him with a gentle smile and tells him he is free to explore the garden. A ghost taker is assign to him. The soul, as usual, seems confused and like he wished to asks questions, but seems content to ask them to his tour guide, and Danny continues with his own duties.

But then, the same soul continues to appear in the same place every two or three days, they exchange greetings and every time talk for a bit longer before the boy leaves to explore once more. It's rear to have multiple visits from one soul, even more so for said soul to appear in the same place every time. By the four time, Danny decides to take a break on his royal duties and accompany his new friend.

~ They get close, and have cute scenes, Tim asks a lot of questions and Danny answers and not-answers a lot of questions ~

One day, Tim shows up as usual, but he is in full Red Robin costume, and well, Danny wasn't expecting an identity reveal.

-.-.-.-.-.-.-.-.-

On the Bats side:

There's an attack of some villain that's able to put Red Robin (or character of your choice) on a sleeping beauty type of sleep while carrying a serious injury, were he stays sleep until teammates or backup gets him out of it. The event affects his soul, making him disconnect partially from the land of dreams and making his soul sleep project almost every time he sleeps.

Tim starts sleeping more often. It's worrying at first, Bruce being paranoid does every test in the book, despite Tim saying he's just finding sleep easier now. But, he was just affected by sleeping magic and suddenly his sleeping easier? Seems like a side effect, and that makes it worrying.

Tim's health in general improve, just like he's concentration and productivity. Who would have thought that working rested actually was more productive than working on less than three hours of sleep and missing obvious details and clues due to how tired you are.

With everything not only being okay, but better than before, paranoia about Tim's new sleeping schedule soon dies, and instead is replaced with teasing about how he used to refuse to rest kicking and screaming, and now he may sleep more than any of them.

On Tim's side, he's loving being able to soul project so often. He knew from the start he was in a different dimension, and he just wanted to know the hows, whys, and everything else. So far, he seems to do it at least once every three days, and he's even gone two times in a row a couple of times.

The garden had a lot of things to do, but Tim doesn't care about that, he's more interested in all the information he's getting. The first 3 times he was given different ghost nanny's, who were more focus on entertaining him and didn't really answer direct question. But then king/prince Phantom decided to accompany him personally, and everything went smoother. He was going back to get to know more about this new world, and maybe to know more about the cute prince/king too. He might also have gotten some better looking pajamas.

Now, he has a mission that takes more than a couple days with some people in his team that hasn't yet sen his face. He didn't realize how difficult it would be to do all nighters after getting used to a sleep schedule. He would usually try to go as long as possible without sleeping, but he decides that he should take advantage of the safety of where they're staying and sleep a bit too. He ended up soul projecting in full Red Robin costume. He tried to play it cool, maybe Phantom wouldn't know it was him.

"Red Robin, even if you didn't appear on the same spot as always, I can feel your soul. I know who you are."

[leafyeyes417]

So Danny had tried, he really had. He had moved to Gotham because he knew his parents wouldn’t look for him there. They had never found out he was Phantom but things had reached the point where both he and Jazz decided to go no contact.

But back to his problem. He had worked out with Frostbite that he actually only had one obsession, Space. He had been happy to know that, he had been getting tired of the constant struggle to keep both ghosts and humans safe while also dealing with ghost hunters.

So his move to Gotham was both to avoid his parents but also the reassurance that there were multiple heroes taking care of things. He had enjoyed the peace for the first three months but then he had started to get twitchy. He had tried getting some hobbies but by month six he knew he was out of options. He had especially clued in when he noticed a few classmates avoiding him thinking he was about to snap. Jazz had been resigned when he let her know the news.

So that’s why he was now sitting on a conspicuous roof, wearing a mask made in the Infinite Realms, waiting for a Bat or Bird to show up. He was coming out of retirement after all. Hopefully he would be able to work with the Bats instead of working around them. He really didn’t want to end up on the Rogue list.

[hailsatanacab]

A Persuasive Argument - dpxdc

"Great!" Danny says, clapping his hands together to get everyone's attention. The dinner table falls silent as everyone looks towards him. It's a full house today and, honestly, Danny's a little nervous. "I'm sure you're all wondering why I gathered you here today."

"It's dinnertime. In our house." Duke mutters, while doing a very bad job of concealing his yawn. He holds his fork poised over the braised beef, but, just like everyone else, still looks towards Danny before tucking in. It's intriguing enough to wait.

"Yeah, no one misses Alfie's dinner." Dick says, with a brilliant smile that Danny can't help but return.

"Precisely! What better time to talk to you all than when you're all actually here!"

"Wait, I thought you came round to work on our English essays?" Tim asks, blinking owlishly.

"I'm afraid I've lured you here under false pretences, Tim."

"This is where I live."

"I would still really appreciate help on that essay though, I mean, what the hell is Hamlet even about? I just don't get that old time-y language, like 'Hark! A ghost hath killed me!' - absolute rubbish, what does that even mean?"

"The ghost never kills anyone in Hamlet, he's there to tell Hamlet that he was murdered. Have you actually read it?"

"No, but it sounds like you have. Tim, I want this guy to help me with my essay instead. I know for a fact that you haven't read Hamlet, either."

"So? We don't need Jason, I've read the Sparknotes."

"Hi Jason, I'm Danny, pleasure to meet you, summarise Hamlet in three sentences or less."

"Am I auditioning to help you write your essays? I can't believe you’ve gone through your whole school life without reading it, it’s good!"

"Hamlet, along with a number of other classics, was banned in our house because it portrayed ghosts as intelligent and sympathetic beings rather than evil, animalistic beasts. I didn’t even get to see The Muppet's Christmas Carol until last year with Tim! It was surprisingly good, and I hate Christmas because everyone always argued and it sucked. But we're getting off topic. I—"

"No, no, please go back to that, because what the fu—"

"Boys, please." Bruce interrupts, looking to the world as if he wants to hang his head in his hands. "Danny, you were about to say something?"

"Oh, yeah, Mr. Wayne! Thanks!"

"Please, call me Bruce."

"Well, that very succinctly brings me to my point, because I'd actually really like to call you dad."

Nobody says a word. Nobody even blinks, all as shocked as the other, watching open-mouthed as Danny pulls his laptop out from beside his chair. Bruce can definitely feel a headache coming on.

"Before you say anything, I've prepared a 69 slide PowerPoint presentation on why you, Bruce Wayne, should adopt me, Danny Last-Name-Pending. Please save your questions, comments, and verdict until the end, thank you."

[fernsfabulousfloweringfacility]

Shoutout to @xmaruu11 and @kitsuneisi for wrecking my brain and destroying my life with this stunning au

[burquillos]

My favorite creature, Deku

[puppetmaster13u]

Prompt 261

“So is no one going to talk about the eldritch space child or…” 

“I mean, do you want to get between a child and Batman? I think the only one who could even get close right now is Superman…” 

“No you’re right, I think- oh my god the eldritch space child is playing with batman’s bat-ears and he’s not doing anything about it what the fuck I thought only Robins could get away with that-” 

[soop-jpg]

young justice has taken over my brain and theyre all i can draw lately <3 also i highly recommend clicking to view the top 2 bc tumblr cropped then bad in the format </3

[ashtonq247]

Just my fav heros- kind and empathetic ☺️ agile freaks of nature 🤩 Linchpins of their franchise 🥰🥹💜

Now I just need to find a hero who fits the bill and happens to be a middle child

[bet-on-me-13]

Steph's Year of Recovery

So! Danny noticed that a new face had made it's way into town. Two new faces actually, an older lady known as Dr Leslie, and a girl about his age called Steph.

He first met them when he was at the hospital for one of his parents. They had stood too close to an explosion again, and he met them while he was in the waiting Area.

Dr Leslie was a strict but obviously caring older woman, who seemed to be the one taking care of Steph as a kind of maternal figure, or maybe more like an Aunt. She greeted him simply and then walked away to talk with the Secretary, leaving him to talk to Steph.

Steph was a blond girl in a Wheelchair, and he could see bandages piking out of her clothes as he talked to her. She explained that she had been in an Accident a few weeks ago that left her wheelchair bound for a while, and that she had come to Amity for their surprisingly good Medical Centers.

He and Steph got along really well, and by the end of it he asked her for her Number so they could continue talking later. They stayed in touch, and when she was finally permitted to leave the Hospital, he introduced her to his friends. They all got along like a House on Fire, both figuratively and in one memorable case very literally (Vlad had pissed them off okay!)

Eventually Steph recovered enough that she moved from a Wheelchair to Crutches, and their shenanigans got even more chaotic (Vlad hadn't even pissed them off, this time was just for fun)

The only thing Danny could complain about was the fact that Steph was hiding something from them.

She said that she had been in an Accident a while ago, which was why they had come to Amity in the first place. But Danny knew it was more than that.

He could sense lingering traces of Death coming from her after all.

...

Steph honestly loved her current life.

Sure she had lost everything, her home, her health, her friends, her life, but she had gained new things too! Like Danny and the Gang! They were honestly some of the best friends she had ever had, and for some reason they just clicked with her instantly.

Danny was interesting and funny, Sam was vegan and a badass, Tucker was smart and witty, they all fit with her personality perfectly! It almost felt like she bad been friends with them for years. (She ignored the way her heart skipped a beat when she saw them)

But she still couldn't shake the sense that they were hiding something from her.

She knew it had something to do with the Ghost Problem in the town. And wasn't that a kicker, there was a whole Supernatural Ghost Outbreak in this Town and nobody knew about it. Dr Leslie had said that Amity was off the map enough to hide from Bruce, but she hadn't mentioned it was hidden from the Justice League itself!

Danny, Sam, and Tucker definitely knew more about it than they let on however. Whenever a Ghost Attack would happen, at least one of them would rush off with some practiced excuse and return after the Ghost Attack was over all dirty. She could guess what was going on, and she really didn't like it.

(This had killed her, she had died doing what they were doing, she didn't want to lose them)

Eventually she had to confront them, coincidentally on the same day they decided to confront her.

"Are you Vigilantes?" / "Did you die?"

"..."

"What?" / "What?"

[darkeneddawning]

Escaped clone au

You know all those fics where Danny and Damian are twins but everyone first assumes Danny must be a clone? How about an au where Danny is Damian's clone who escaped the League after he was assumed dead. Damian could even have been the one to have "killed" him, back when Danny was a newly created, fully brainwashed clone minion and trying to kill Damian himself.

Danny gets adopted by the Fentons and canon goes on as normal, until Dan. Witnessing what would happen to the world should he turn evil really drove home to Danny how dangerous he is.

Even if he was confident he could be trusted with his absurd amount of power (which he isn't), what if the League of Assassins found out about him? Does he still have programming triggers from his evil assassin clone conditioning?

So, Danny does the responsible thing: he goes to Batman to turn himself in.

Cue Danny showing up on Bruce's doorstep with ghost hunting equipment, intel on the afterlife, and an almost unbelievable backstory. Somehow he still managed to be more well-adjusted than Damian.

More thoughts under the read more

Here's how I'm thinking Danny leaving the League went down:

After surviving his wounds but failing his mission, Danny (then an unnamed potential Damian replacement) knew there was no point in returning to the League. As a failure, he was meant to be disposed of. He even thought of simply allowing himself to perish, since that was what the League would do.

But he couldn't help but feel as though that would be a waste of a resource. Surely he could be of more use to the League alive than dead?

That tiny bit of rebellious logic is what caused Danny to go into hiding, only living on based on the off chance he would find opportunities to further the League's goals. Obviously, that mentality didn't last long after being exposed to the real world and meeting one Jazz Fenton.

Being adopted by the Fentons was the best cover Danny could have asked for, since any odd behavior he couldn't hide while he was learning how to be "normal" was totally overshadowed by the sheer bizarre eccentricity of his new parents. He was still the neighborhood weird kid, but even that was a major upgrade from disposable tool, so Danny considered it a win.

Anyway, if anyone likes this idea, please feel free to have at it! Interpret it as you please :)