Villian for Hulk 2: the Leader?

So who thinks that the villian for the next Hulk film will be the Leader? I've been looking at various posts on other blogs, and they either think that the villian will be Doc Samson (the guy Betty was dating in the movie) or the Leader. It was not made clear who her boyfriend was, so I think the most probable villian will be the Leader. You see his transformation in the movie- Sterns has some gamma-infected blood drop on a graze on his head.
What do you think? Tell me!