Definitely an interesting topic, given the last couple chapters.
My thoughts: Naruto tried to reform Pain, even after the Konoha invasion. PAIN! Who he had no former connection to, and who demolished the entirety of his village. If Naruto can resist the temptation to bury a Rasengan in Nagato's forehead, then Sasuke would have to die from the Kyubi, rather than Naruto's free will.
With his father having stressed the importance of not giving into the Kyubi, the gift from Itachi (who was really trying to protect Sasuke), and the unknown frog scroll, Naruto seems to have a lot of hidden reserves that will prevent him from losing it on Sasuke.
My personal opinion: Sasuke was a stuck up brat as a kid, and a villain for his entire adolescence. If there was ever anything worth redeeming, it is long gone.
I want to see Kakashi get appointed to hokage, and decide that Sasuke needs to be killed. That would put a serious conflict of interest in Naruto's mind. Then, Naruto would have a realization that the office of hokage and the need to control others is the root of all evil, and he and Sasuke would form a new village, just like the 1st and Madara did.