6. Captain America: The Frozen Avenger (The Incredible Hulk)
Here's an easter egg so subtle that you'll need to borrow a magnifying device from Stark Industries to see it (not to mention the fact that it isn't even the movie, given that the scene was cut). It has, however, been confirmed by those folk over at Marvel (including
Hulk's director), who intentionally evoked to include Captain America's frozen body in the scene I mentioned previously, with Bruce Banner attempting suicide in a frozen wasteland. Of course, since this wasn't used in the final cut, it's not technically a "true" easter egg, but I'm sure Marvel fans will be pleased to know that this thing exists in some form. This scene was originally supposed to take place somewhere towards the beginning of the movie, with Banner feeling alienated and out of options regarding all of those inconvenient transformations, and the eagle-eyed amongst you were supposed to notice the Captain's shield in the snow in the lower left corner of the frame (supposedly he's there, too). The character would, of course, end up here after the events depicted in
Captain America: The First Avenger.