Re: Naruto Vs. Sasuke....
My take on it:
Sasuke is going to kill Naruto, thus activating Itachi's gift. When Naruto dies, Itachi's eyes, which are implanted in Sasuke, will be forced to cast (in the same way that Itachi gave Amerterasu to Sasuke and "programmed" them to attack at the sight of Tobi) Izanagi ON Naruto.
This will have the effect of closing one of Sasuke's eyes, and then Naruto and Sasuke will fight again, and Naruto will win.
Then, Tobi will come and kill Naruto, and Sasuke will voluntarily cast Izanagi on Naruto to save him. Tobi will be defeated by Team 7, and Sasuke will be content to live a life of blindness.