Disney/The Avengers

Cast: More ideas?
 * Buzz Lightyear (from Toy Story) as Iron Man
 * Phineas Flynn (from Phineas and Ferb) as Captain America
 * Bolt (from Disney's Bolt) as Thor
 * Kim Possible (from Kim Possible) as Black Widow
 * Robin Hood (from Disney's Robin Hood) as Hawkeye
 * Tinker Bell (from Peter Pan) as the Wasp
 * Cornelius Fillmore (from Fillmore!) as Nick Fury
 * Ingrid Third (from Fillmore!) as Maria Hill
 * Dr. Calico (from Disney's Bolt) as Loki