Eric Bana didn't want to do a sequel (not sure why). And this movie isn't really a direct sequel of the last. Norton and the director decided they wanted to do their own continuation of the story. Kinda sorta like how the old Batman movies were.

Norton and the director both agreed that this one should have more action in it than the last, so I guess we'll see. I think this one will be better even though the Hulk seems to be a tad slimmer than I'd hoped for.