my perdiction of what will happen to sasuke
he gets beaten senseless by naruto itachis gift shows him the tructh of what happened 16 years ago or itachi convinces him to stop sasuke teams up with naruto to kill madara madara kills sasuke when sasuke tries to save naruto ( like in the land of waves arc) then naruto kills madara and become hokage start of part 3
That could be a possible conclusion but I think as long as the Manga goes on Sasuke will be there. Naruto-Manga will end with eigther the death of Naruto, Sasuke or both of them or with a "Sasuke becomes good again and everyone's happy"-ending.
I somehow still think or hope that Naruto dies while he saves Sasuke's life from Madara's attack (or even someone else's mabey). Sasuke then gets his revenge on Madara one last time and then atones for what he did in the past.
This way even the prophecy would be fulfilled as he brang a change to the Ninjaworld by stopping the Uchiha's hatred and the eternal battle between the descendants of the SO6P sons. Plus he will change the mind of all shinobi on the battlefield of course due to his noble sacrifice . U_U