Sasuke is not going to leave this battle alive, sasuke will be fatally injured. Sasuke will decide to do atleast one good thing for the shinobi world and naruto his friend before dieing. He will tell sakura to transplant his EMS eyes into Naruto and since naruto is an uzumaki and due to the death of his friend it will instantly turn into rinnegan. Sasuke will be seen as a hero and will ironically reflect obitos sacrifice of his eyes to kakashi. Naruto will them go on to defeat the last enemies of the manga and become hokage. I see this as the only way sasuke can go. I just cannot see kishi having him going back to the villiage or even becoming evil again