Why the Naruto vs Sasuke fight may occur:

[LaFlameXX]

Naruto said "NO, I WILL END THE BROTHERS' FEUD HERE". I think this suggests that he's not going to have the same outcome with Sasuke as Indra and Ashura (them both dying). I think what he will do is, fight Sasuke to free the bijuu's and to then TNJ him into not killing the gokage's, and then come to an agreement about his 'revolution' plan to unite all five countries. This sounds quite underwhelming, but since Sasuke is stubborn/arrogant I think the fight for the bijuu's will be epic since he doesn't want to let go of a big aspect of his plan so easily and because Naruto is strong as hell aswell and will put up a fight for Kurama and the rest.

Sasuke won't die in this fight. If he does, who the hell's gonna help Naruto reverse the effects of IT and free the people? If Naruto kills Sasuke then he's basically given himself a worse reality (Just him, Sakura and Kakashi living in an empty world with no other people, rendering their efforts in the war to save everyone useless) than the reality Sasuke wants (united nations, everyone being saved from being white zetsu etc.)

So, this fight won't be a 'fight to death' type encounter, but will still be epic and will have a 'Last boss fight' feel because Naruto will fight to save his bijuu friends and try to change Sasuke's mentality and come to an agreement, but Sasuke won't let that happen easily and will proceed to fight Naruto.

 

[PyRoxGoD]

Sasuke redeem himself by setting everyone free from IT and using rinne tensei to revive everyone don't u remember every "villain" in naruto always redeems themselves before death