My post should probably be in the "unpopular post" thread, but Hulk is a concept character, not a story character. That's why he never works as a one-off movie. He's better in little bits. He has no story, no arc. And no one really wants to see him cured -- which would give him an arc and thus a story. But the old beauty-and-the-beast is so obvious and overused. Truly, he's a character with a dilemma but without a story -- everyone likes him because he's just unabashed rage -- the angry man, the beast, the frustration of... everything, whatever you want to call him. He's testosterone on steroids on meth on... he's a young boy's raging hormones.
That's why every "little boy" loves: Hulk... smash!
He'd be perfect for a Planet Hulk movie