9. Edward Norton
The Incredible Hulk wasn't a flop, but it stands out as something of a failure in the Marvel Studios library. Edward Norton rewrote Zak Penn's script, but when the movie was finished, Marvel decided that it needed to be shorter with more action. The actor disapproved and would show his displeasure by refusing to help promote the movie come junket time. Screaming matches apparently ensued during various stages of production, and when details of those behind the scenes issues found their way online, the relationship between Marvel and their new Bruce Banner was destroyed. This was also the first occasion that Marvel really upset fans, something which was obvious by the fact that the new Bruce Banner Mark Ruffalo was met by boos when he walked out on stage at the 2011 Comic-Con.