A Stan Lee cameo is just as iconic to the Marvel film universe as the characters that lead the films. Plus, he's the only guy who gets to do the transfer over to Sony, for Spider-Man, Fox for X-Men, and all of the Marvel films too. He even pops up in other stuff: from comic-related things like "Heroes," and even non-comic projects like The Princess Diaries 2!
One of the best theories is that Stan "The Man" Lee is in fact Uatu, the watcher, always there for great events and life changing moments in Marvel lore. He's been everyone from a hot dog vendor, to a security guard, to Hugh Hefner. This guy's got range.
It's no new thing either, he's been popping up in everything since 1989 as a Juror in Trial of the Incredible Hulk all the way up until Guardians of the Galaxy, and there's no way he'd miss the next Avenger's film.
Of all the Easter eggs in Marvel films, Stan Lee's cameos are the most consistently entertaining. Here we rank the best of them, so vote up your favorite!
http://www.ranker.com/list/best-stan-lee-cameos/ranker-comics,
Stan Lee
Mallrats
Willie Lumpkin
Fantastic Four
Xandarian Ladies Man
Guardians of the Galaxy (Footage not yet uavailable.)
School Librarian
The Amazing Spider-Man
Pageant Judge
Iron Man 3
Hot Dog Vendor
X-Men
Larry King
Iron Man 2
Hugh Hefner
Iron Man
Milwaukee Man Drinking from Bottle
The Incredible Hulk
Can I Have My Shoe Back?
Thor 2