You know and love these guys so I'll do my best to keep things simple (well, at first). As the storyline progresses, I will add the characters that need to be added so be sure to check back in every so often.

Tony Stark
Aka Iron Man
((Taken by sleeplessthoughts- ))

Steve Rodgers
Aka Captain America
((Open))

Bruce Banner
Aka The Hulk
((Open))

Thor Odinson
Aka... well, Thor
((Taken by _bsav_ ))

Natasha Romanoff
Aka Black Widow
((Open))

Clint Barton
Aka Hawkeye
((Taken by Burning_Girl ))

Loki Odinson/Laufeyson/Friggason
Aka Loki
((Open))

Nick Fury
Aka Fury
((Open))