+1
Whatever the reason, it's a huge bummer. The idea of getting an Avengers movie with two fantastic actors like Robert Downey Jr. and Edward Norton was just too friggin' cool to actually happen in reality, apparently.
I didn't love The Incredible Hulk, but it was better than Ang Lee's Hulk, and it showed promise. This is a shame, not just becase Norton won't be involved in this film, but because it means we won't get to seem him in another solo Hulk film. Boohiss.