Captain America might be the leader and muscle of the team but he is the most broken. Captain America: The Winter Soldier will surely show us the broken pieces of Cap's life and him accepting the modern world for what it is.
Quick question, though: Has he really gotten over the fact that there is a flying me existence through S.H.I.E.L.D or from his teammates. So my question is how would a super-soldier lead a team of totally different people against a giant purple tall man, a norse God, and a giant green goliath? If I was in his shoes, I would be tripping out pretty badly. Cap will most likely learn of Thanos'sTitan? How is the man not in a mental asylum yet?
Cap has fought and lead his team against Loki. Will Thanos be his match? Unlikely as it is, Cap. Steve Rogers must in the end forge his best battle plan yet. That's what fans should be looking forward to in Cap's story in The Avengers: Age Of Ultron; his military strategies. Sure his army is long gone. But if you think about it, The Avengers are his army and he must deal with the fact that whether he likes them and accepts them, or not, they are all he's got. Remember that scene when Cap asks Tony Stark in the first Avengers movie, "Is this the first time you lost a soldier?" Tony replies, "We are not soldiers!" That is what the film should incorporate with Cap's leadership. He should somehow convince the team that they are in a way soldiers that are brought together when needed.
Captain America: The Winter Soldier is to have scenes with Steve's long-lost love, Peggy Carter. But the film will also introduce a new-found love interest for Cap. If this is to be set in stone, The Avengers: Age Of Ultron should have a bit of Steve's relationship with his love interest and how he copes with the fact that he has a responsibility leading his team but also protecting the one he loves.
If you think I was going to leave Iron Man out of this section, think again. It seems like Rogers and Stark have made up in the first film, but don't think for a second that that's settled. In a lot of Avenger comics Tony and Cap get along, but most of the time it is the question of leadership and who is better at it. The Civil War comic showed Steve and Tony fighting and Cap beating the shit out of Stark in the suit. Needless to say, were are very early on for the Civil War story line to take place. But ever since the announcement of the sequel, I always thought, "Wouldn't it be badass if these two heros got so pissed off at each other that a fight broke out?" And this is from a pure, visual feast point of view. Don't forget that in the first film Cap tells Tony, in rising tension, "Put on the suit, let's go a few rounds." So an internal fight might just happen.
And finally the suit. If you didn't see the post about Cap's new suit design visit here. If you did, you will agree that that version of the suit looks like a classic warfare outfit and matches Cap and his uniqueness. might keep that suit for The Avengers 2 or might amp it up with more protective gear!