It does look interesting, but yeah, I agree about the S.H.I.E.L.D. helicarrier. It's like the Enterprise in Star Trek movies.
Captain America is my all-time favorite superhero, and I was very cautiously optimistic about the first movie, The First Avenger. Since this sequel is produced and written by the same folks, my optimism is stronger this time.
I read elsewhere someone complaining about how in the movies Cap was not a bad-a@#. I do not know what they are talking about, case in point the elevator scene where he owns all the bad guys. What he is not is a jack-a@#. He is not rude, confrontational or some vain big swinging d@#$.
That said, I am ambivalent about the trailer. It is a bit too closet-fascist for my taste. But the movie might be better.