#the fact they changed Nick's character completely to fit the cookie-cutter template of

[garr9988]

See, the big thing I got from the original three Night at the Museum movies was that the qualities of the best night guard are compassion, empathy, intuition, and ingenuity. Larry was good at understanding and learning about the exhibits, what they wanted and how to make them happy, how to help them get along with each other.

Kahmunrah Rises Again completely ignores that and turns it into a generic vague issue of confidence and physical capability, with the extra Deus Ex Machina hail-Mary of being able to understand music & having a smart tablet on hand.

Going by the first three movies, if Nick needed to "prove himself" as a fit replacement for Larry, he should have been shown to be able to help exhibits, not "save the world" (even if that's what happened in the 2nd movie - funny how the stakes weren't even that high in the 3rd and originally final movie. It called out the Tablet's prophecy/warning being about the end of the magic, not the end of the world).

If they wanted to bring Kahmunrah back, Nick's best way to prove himself as a good if not better night guard would be to help redeem Kahmunrah and establish a positive relationship with his family and the rest of the exhibits!