I think Kimimmarro(gawd I can't get his name right) will fight Naruto and Naruto will nearly lose, then Sasuke will show up in his new form or whatever, kill Kimmmyiaroo than reveals that he has no interest in returning to the Leaf, and says that he hopes to fight Naruto on a fair playing field next time they meet.
Well, ok it won't sound that nice but that's the general idea.