After Eric Bana failed to connect with the audience in the 2002 Hulk film, Marvel took matters into its own hands with this effort that stars Edward Norton as Dr. Bruce Banner who, after being exposed to gamma rays, transforms into the Hulk when he gets angry. Extremely strong film with Banner on the run from the military, but apparently Norton and Marvel butted heads creatively and when the character next appeared in The Avengers, he was portrayed by Mark Ruffalo.
Explains Norton, "Bruce Banner is the guy who monkeys with the secret forces and gets burned by them in a way that ends up isolating him, exiling him to this lonely existence There's something in the story of a lonely, moral guy in this self-imposed exile, trying to protect the world from this terrible thing inside him that I think people relate to. They like the story of the oppressed, chased, hunted man who has this righteous bite-back when you push him too hard. When you're a teenager, there's a terrific fantasy in that. It's that feeling of being lonely, of being outside, and the fantasy that if people push you too hard, you've got this thing that's going to rise up out of you and defend you. That taps straight into the way you feel as a teenager, and that's where it starts."