Billy Brennan or Nick Van Owen?

Definitelly Nick Van Owen. I really don't know why though. Maybe just because he's more symphathetic to me.

I would like to see Billy Brennan have a cameo but Nick Van Owen to be one of the main characters

I like Nick Van Owen better, so I'd go with him. He was a better character all around in my opinion.

I can't choose. For Billy we could have a character who was naive and almost died. He could have learnt a lot and be someone more responsible and reasonable. And through this character delevopment we could feel how much time has passed since the third film.Nick on the other hand is a symphathetic character to the audience. He could be better involved in the story because he is a greenpeace member and fully against a park. Vince Vaughn could also show more serious side of him after a bunch of romantic comedies, which is also interesting for the audience.