I definitely don't want a Hulk movie. He works in small doses. I'd like to see Banner in IM3, hanging out in the R&D floors of Stark/Avengers tower. Ruff and RDJ have awesome chemistry on screen, it would be a shame not to take advantage of that.
I'd be open to fleshing Hawkeye out in a SHIELD movie, along w/Black Widow, Fury, Hill, Coulson, etc.
I would like to see, in no order:
(A) LUKE CAGE & IRON FIST/HEROES FOR HIRE - A superhuman buddy-flick.
(B) DOCTOR STRANGE - Starring: Alan Rickman/Script: Neil Gaiman /Director: Terry Gilliam. I want to leave the theater feeling like I dropped acid. Steve Ditko-style.
(C) WONDER MAN - Simon Williams, an invulnerable stunt man turned superhero. That has massive potential. Get Helmsworth's brother cast, and a writer/director team that knows how to balance comedy/action/fun and you could do a LOT with that character.
(D) SHE-HULK - Gamma-powered 'Ally McBeal'. Get Gina Carrano since DC will never use her as the Wonder Woman she is...