All the Hidden Endings to Marvel Comics Avengers Prequels in One Convenient Place

I've now seen all the Marvel Studios-produced films leading up to next year's Avengers movie (and my God, I hope it's awesome), and with the disappointing exception of Iron Man 2, I damn near love them.  Here, in breathless anticipation of the Avengers film, are the teaser scenes that appear after the end credits of the previous movies.

Iron Man:



The Incredible Hulk (I couldn't find the actual scene, but a piece of it was used in a TV commercial for the film)


Iron Man 2 (the worst of the films, but the best teaser scene):


Thor:



And finally, Captain America:



Avengers assemble!