What is a movie you would like to be made into a sequel and how would you do it?

What would the new storyline be? Would the old cast be back? Who would
be the new cast? It can't be Star Wars, Spiderman, Batman, Friday The
13th, Halloween. Pick something that doesn't have a franchise. I'm
just wondering how people would do it :-D And it can be a animated
movie as well!