Well, these are awesome. Our pals at ScreenCrush hipped us to some artwork of Alison Brie as Captain America, Sandra Bullock as Iron Man and Amber Heard as Thor. That could be a pretty fun movie. Ryan Gosling as Black Widow, perhaps? These pictures come from Fan Art Exhibit, and if you like these, you should definitely check it out -- there's all kinds of awesome stuff. Enjoy!