Ok, here me out people. Sasuke will kill Naruto, and here's why.
Bottom line is, Sasuke is evil. He holds no affection for Naruto what so ever. All Sasuke cares about is revenge. All Sasuke cares about is walking his own path, and getting revege for his clan his own way. He doesn't care that Itachi died to protect Konoha. http://read.mangashare.com/Naruto/ch...3/page017.html
Sasuke will do, whatever he can do, to destroy Konoha. And he won't let anyone get in his way.
Now, Naruto on the other hand still holds great affection for Sasuke. Naruto refuses to sever the bonds of friendship that, he and Sasuke once had. Even if it came down to either kill Sasuke, or watch Konoha crumble. Naruto will still refuse to kill Sasuke.http://read.mangashare.com/Naruto/ch...3/page004.html,
Now, Kishi gave us all a clue that he plans on Killing Naruto at some point.
Now, why would Kishi have the Kyuubi say such a dramitic statement, if at some point he wasn't going to have Sasuke kill Naruto.
Whatever happens after Sasuke kills Naruto is anyones guess.
Of course I highly doubt that even if Sasuke were to kill Naruto. Naruto, would stay dead for very long. Kishi would find a way to bring Naruto back from the dead; and then have Naruto save Sasuke from whatever consequence Sasuke is facing from killing Naruto in the first place.