As the heroes prepare to assemble, we look back on previous films
'The Incredible Hulk'
'nuff said: Marvel's attempt to re-boot Hulk within the same continuity as "Iron Man" and, eventually, "The Avengers," included a cameo from Robert Downey Jr. and references to SHIELD. Edward Norton played Dr. Banner, but he'll be replaced by Mark Ruffalo in "The Avengers."
Worldwide box office: $263 million