Update: concept art of the suit that will swaddle The Mighty Shoulders of America as the glorious fighting happens:
This gon' be good, you guys. It looks pretty much identical to the AoU suit, but with a few stylistic touches from the Winter Soldier stealth suit. The red highlights on the chest are gone, as are the white biceps, and the boots are different. I love it!
Next in our continuing series on how badly Cap is going to beat Iron Man: Cap's durability.
Direct grenade blast knocking him into a bus that subsequently crashes? Slightly dazed for a few seconds. Forty-storey fall, landing directly on the ribs? Momentary grimace of pain, then immediately destroys a jet in hand to hand combat. Drop like two-hundred feet? Bro, he did that one on purpose, without even hesitating. He jumped onto that Helicarrier with less trepidation than I would have about walking down a staircase two steps at a time.
Also, I don't have a gif of this bit, but in that final fight with Winter Soldier I'm pretty sure he gets shot three times, stabbed twice, takes innumerable hits to the face from a robot arm and still wins comfortably. This is without even mentioning all the ridiculous stunts he pulls in Age of Ultron. I know it seems like the man in the metal super suit should have an advantage over a dude in a blue onesie, but... Captain America, you guys.
EDIT - I agree that the movie seems overstuffed with characters at the moment, but I'm into it. I mean, I'd like to see another awesome Cap solo movie as much as the next guy, with Cap and Falcon bro-ing out while they track down Bucky, but this movie actually sounds even better to me: a mini-Avengers movie that focuses on the best Avenger. It's basically the movie I would make if Kevin Feige called and put the next Avengers movie in my hands. I mean, sure, I'll put all those other dudes in the background for most of the scenes, but the vast majority of the movie is going to be Cap throwing down with bad guys in the most awesome ways possible.
As for exactly how the Civil War's going to work, that's a tough one. At the moment in the MCU, there aren't really that many superheroes who actually have secret identities. Everyone knows who Iron Man is, and after Black Widow dumped SHIELD's files onto the internet, pretty much everyone else has gotta be public knowledge. The best theory I've seen, which I will shamelessly steal here, is that we're going to see a big influx of Inhumans in the MCU after some upcoming events on Agents of SHIELD. Season 2 is ending next week, and the finale is looking like all-out war with the Inhumans, and Season 3 will presumably lead right in to Cap 3. It's always hard to guess exactly how much of an effect Agents of SHIELD will actually have on the movies, though, since I imagine only about 1% of the people who see Marvel movies actually watch the show.