He's what i'm thinking is going to happen. Naruto and Sasuke fight, that is pretty much guaranteed at this point, and, as foreshadowed by Naruto, they both die in the fight. At that point Sasuke realizes the purpose of what Naruto has been saying all along and lets go of his hatred as he dies (perhaps a line about this being ultimate end to revenge, digging two graves.) However, we've seen thus far that death is not finite in this series. I'm thinking Obito, having realized that he has been duped by Madara all along (who by the way at this point would have somehow extracted the nine and eight ails and be in the process of becoming the Jinchuriki of the Junnbi), decides to sacrifice his life and use the Samsara of heavenly Life to revive Naruto. Naruto will in turn receive Sasuke's eyes, perhaps a line thrown in about seeing the world as he saw it, and will activate the Rinnegan, having nearly had his life force extinguished during his death. He will then fight Jinchuriki Madara in a repeat of the original sage v Juunbi fight. He will win probably with a huge attack at the end and take all of the tailed beasts back (thus fulfilling the prophecy of the tailed beasts. He goes on to become the greatest hero and homage ever and marries hinata. (Sorry for the long post, I just wanted to get all of my thoughts down).
I vote for this, becuase Obito and Madara win, Naruto can believe he's won, and Rin can be alive!
