Mark Ruffalo recently spoke more on the potential of a Hulk solo movie:
“He’s the one person who doesn’t want to do the very thing that all of us are dying to see him do, and he’s the one person who doesn’t want to be there, and so it can get very maudlin,” explains Ruffalo.
“It could get very boring to watch the guy who’s moping around who doesn’t want to do the very thing that we’re all dying to see him do. But I do feel like we’ve gained some ground on this new version of him.”
“I think the relationship between Banner and The Hulk as a conscious conflict… it could be really interesting. The one thing that I think The Hulk is terrified of is Banner, and that’s never really been mined.”
He also confirmed that the cast of the Avengers 2 movie will be at SDCC this year:
“Yeah, we’re gonna go out there,” confirms Ruffalo. “We’re all flying, we’re flying from London. We’re working. We’re shooting. We’re gonna stop and get on a plane and go to Comic-Con together. It’s gonna be amazing.”