User blog comment:Milomilk/Why are they changing Bruce Banner's actor from Edward Norton to Mark Ruffalo/@comment-238662-20111108113121

In an interview ages ago, it might even have been at Comic Con when they revealed the cast line up for the Avengers. As for the Norton incident there was a whole statement battle between Norton's agent and Kevin Fiege. Fiege saying Norton was difficult to work with and Norton saying there was a disagreement over the money.