I just came across this exclusive spoiler about the new Hulk movie. Apparently Marvel studios is continuing it's cross-marketing scheme with it's characters and has put a scene in the new Hulk movie with Captain America. Unfortunately the clip was cut from the theatrical version but http://www.comicbookmovie.com/ has managed to get their hands on the clip.
Warning: apparently part of the reason for it's omission was that the course language would bump it from PG to AA so beware of the harsh language; not intended for young viewers! Maybe they'll put it in the DVD.
Here is the video: