Bully 2 Wishlist in general:
-Ragdoll physics (Euphoria engine would be great)
-Realistic/hardcore fighting mechanics (Similar to "The Warriors" fighting mechanics)
-BIGGER variety of fighting moves (ranging from Karate to Wrestling)
-More of an interactive environment
-Bigger environment
-More weapons
-More bikes (Dirtbikes, police bikes, more customizable bikes)
-Finisher moves (like in The Warriors but if Rockstar wants, dumb them down since you know... they're kids)
-Better missions
-Add more classes
-Add sports like Football, Baseball, Track, Basketball and Wrestling (Have them as classes)
-Bigger variety of side missions
Extra:
-There should definitely be a soundtrack to the game from licensed artists such as The Black Keys, Pusha T, A$AP Rocky, Pharrell Williams and maybe Danny Brown.