Bucky Barnes, aka the Winter Solider, may have been a villain last time around, but he's definitely back on the side of his old army buddy Steve Rogers in this one. Picking up on his story from the last Captain America film, which had him feeling rather confused about things, it appears as though Bucky could well be a big source of tension between Steve and Tony Stark. That's because of that post-credits scene in Ant-Man, where he's trapped in a vice of some sort, and Cap is pretty adamant on not calling Tony. That means there's probably been a huge breakdown of trust between them already at that point, or even that Tony had something to do with his being there. Either way, it's likely we're going to see these two face off, and while that may not be the main fight, it's gonna be one hell of a warm-up. Bucky is likely to be Steve's right-hand man now that he's got his head straight, and will surely be doing all he can to stop Tony, while he's an obvious target for Stark if he's trying to figure out how to hurt Captain America the most. Oh, and Bucky did kill his parents. That's gotta hurt. Who will win: Bucky's good, but this is just Stark's warm-up fight, and he's got bigger things to take on. Stark in round 1.