I might be the first to get this up, just thought the internet would appreciate that.
Got it from Marvel's tweet posting links to their Super Bowl trailers:
The Captain America #FirstAvenger & #Thor #SuperBowl spots! Cap: http://bit.ly/fnF0Ep & Thor: http://bit.ly/etiMPU"
And after a few tries, got a good freeze frame. I really can't wait to see this movie.
UPDATE: Other internet nerds are faster than I am