Alright I've come to the conclusion that Sasuke will get senju DNA after orochimaru turns bad and tries to steal his body but Sasuke kills him once and for all. Then Sasuke and naruto will fight and naruto will nearly kill Sasuke but Sasuke will awaken rinnegan in the last minute and kill naruto. Feeling bad because naruto was always a brother to him he revives naruto and dies but not before giving his eyes to naruto to bring peace to the world. That way when naruto and Sasuke fight as naruto stated both will die and naruto's prophecy will be complete.