This I guessHe won't have a change of heart. He will finally notice he was used by Tobi and try to kill him with/without naruto's help
Or he will just die as the same phsyco retarded bastard he is.
Not a bas theoryTo be honest Sasuke will live and suffer a change of heart and Naruto will die in the end. Naruto will die with a smile as he managed to save his friend. However Sasuke won't return to Konoha while Naruto would be proclaimed as the sixth hokage post mortem.