I think they set it up nicely now that Banner’s turning 46 years old, and there comes a point where it’s like ‘how much more running can I do for myself?’
Whatever you hate about yourself or you don’t like, when you get to be 46 years old, you start to say ‘okay, no.’ Obviously, you can never really get away from yourself, so you start to live with some of the things you think are so bad. And maybe they’re not that bad. Maybe those things are what you need to do whatever you were never able to accomplish. I think that’s the ticket forward for Banner, to start to figure out where we go with him, keep that story interesting. I think there’s a whole relationship with Banner and Hulk that needs to be discovered. There’s a very cool thing happening: Hulk is as afraid of Banner as Banner is afraid of Hulk.”
It’s in the comics. But because you haven’t really been able to get inside of Hulk’s head, because the [cinematic] technology wasn’t available to make it nuanced enough to do that, and now it is. So now I think there’s a way to do it. Both of these guys are obviously the same guy, and they have got to come to peace somehow with each other. And I think that this confrontation is building along the lines of this film.
Mark Ruffalo on Bruce Banner’s arc in the sequel (via fyeahlilbit3point0)