Hulk is still and will always be an A-list character. He stood the test of time, bad shows, bad movies, bad cgi, and recasting. He still as popular as ever. I do wonder if IM and Cap's relatively new found popularity will last past the MCU, RDJ and Chris Evans, or is their popularity attached to the actors playing the roles and the MCU? At some point someone else will play those roles, but maybe by then it won't matter. Then again, they might never recast Evans in our life time, since he's so young. My guess, IM, Thor and Cap will remain popular one way or another. Disney will keep them popular. Disney might keep Hulk on the sideline as much as they can until they get him back though 100%. If and when they do, I see them giving Hulk a big push. They're not afraid to take a short term loss. They completely black listed Wolverine and the X Men for years in every way possible or as much as they could anyways. They can't go that far with Hulk because he's too popular.
