Not to mention the fact that Naruto only has Yang power of the demon. Once he unlocks the Yin, Naruto will be godly. I'm giddy just thinking about the anti climatic battle between Naruto and Madara while Sasuke sits at the side like.
If this is too much to ask for all the Sasuke haters, then i'll try and explain this to you in a way even you would understand.
Sasuke is like Vegeta. Naruto is Goku. Buu is Madara. If you remember the show, Vegeta sits at the side like while Goku fights Buu or the fate of the world.
The point is, Naruto will get stronger then Sasuke enough to pawn his little unemotional ass. Besides, Sasuke is gonna lose to Itachi.