Considering we've only got a few villains left before the finale (Akatsuki Leader, Blue Hair, Zetsu, Itachi, Kisame, and Tobi (assuming Deidra bites the dust)) how does everyone think that's going to go down? I really don't count Kabuto in this because I can't see him getting anymore than a few chapters to deal with the 'I'm the New Improved Orochimaru' issue.
As much as Tobi brings interest to the Naruto series, I can only see him fighting some minor character. There'll be an unmasking, HOLY CRAP IT'S WHOEVER (most likely Obito as has been pointed out numerous times), and then some resolution to whatever character he's related to.
Zetsu, while I don't see a main character fighting him, is pretty interesting. He is a giant venus flytrap, which at least gives him an original look if nothing else.
Blue Hair we know nothing about except that she/he has blue hair and a penchant for flora. I don't know what to think of her.
I'd like to see AL come in a just waste everyone like it's nothing, just to reinstate Akatsuki as the badasses they were made to be. That, and a person who can organize and control a group of lethal S-Class nin should be nothing less than godly in the Naruto world.