I like the Captain America costume. The wings on the mask were a little silly (sorry, I know the Flash can make the thunderbolts on his mask work, but it's always sort of bothered me on Cap), and I think it's a good blend between the main Marvel universe and the more militaristic-styled Cap of the Marvel Ultimate universe. They better give him a damn good reason to wear the red-white-and-blue like that it's something Steve came up with and that the uniform is fireproof/temperature controlled/bulletproof, though, because admittedly it does look somewhat silly. Also because in the 90's flick they just put him in it at such a pace that even Steve Rogers called them out on it and commented on how silly it looked.
I mean, at least the first of the 70's movies gave him a reason to put him in the costume. True, hackneyed as it was and silly as it looked, at least they did set Reb Brown up to make the costume look the way it did; they played off Steve Roger's established continuity in that he was an artist (or something like that, my knowledge of Cap is slightly limited) and the costume was based off something he drew.