Imagine the Hollywood actor whom you'd least expect to play The Incredible Hulk in The Avengers, and maybe, just maybe, you'd come up with the name of Mark Ruffalo. He's always been an actor's actor and is getting critical raves in Focus Features' The Kids Are All Right which opened last weekend. But I've learned that he's now in late-stage discussions between Marvel and his brand-new agency United Talent to play this key member of The Avengers ensemble. Like Edward Norton, whom he'd be replacing, Ruffalo would bring real chops to the role. But, unlike Edward Norton, he wouldn't an on-set asshole.