Based on other films that had late sequels: they're the parents now, all boring and business like. Their kids are the ones who get into hijinks, but the parents need to reignite their sense of wonder and adventure to rescue the kids.
I think that covers about 80% of the required sequel tropes.
This is pretty good! One thing I would suggest though is adding a "choosing an instance" subsection to the intro, specially clarifying that some instances are better suited than others for certain people, based on their primary communities.