I dunno, it seems like a real step backwards if they actually did it: first, they did TWO Hulk movies, and they were both okay and did decent enough bank, I guess, but there's really only so much you can do with that character in his own narrative (especially if he's got a HANDLE on his power).  And the Marvel movies seem to be going in wider directions.  We COULD get Planet Hulk, I suppose, which might be interesting, then he could team up with Guardians of the Galaxy and get back to Earth that way... but I think in terms of a traditional Hulk movie, I don't think we're gonna get that.