You'd be forgiven for getting the impression that Marvel don't really know what to do with the Hulk. He's a founding Avenger, yet has just milled about offscreen (or in post-credits scenes) for anything that isn't a team-up since he was recast. He's just such a powerful, dangerous character that having him just hanging about poses questions bigger than "Why doesn't just call the Avengers for help?" which is the assumed reason why he was last seen in Avengers: Age Of Ultron jetting off to an island where he could sit about until a film next needed him. Well, maybe Marvel does have a plan after all (you don't say) - the latest rumours about the MCU suggest that Hulk is set to appear in Thor: Ragnarok. Well, I certainly didn't see that coming. The popular theories surrounding his disappearance (aside from chilling in Fiji) was to have Bruce Banner heading skyward for something approximating Planet Hulk, an arc to be realised somewhat in Guardians Of The Galaxy Vol. 2 or Avengers: Infinity War. But nope - he's going to be teaming up with buddy Thor. Which is great - aren't these sort of crossovers what this whole shared universe thing is all about anyway? This makes the Green Goliath's absence from Captain America: Civil War a little more palatable - rather than once again being totally MIA until the next Avengers movie, Banner's going to be off doing his own adventures - and injects some extra interest in what has always been the least interesting Avenger sub-franchise. The same rumours also suggest Tom Hiddleston will return as Loki, which is obvious and barely even worth commenting on. Thor: Ragnarok is released on 3rd November 2017.
