i figure that sasuke will follow Oro after that whole barrel thing and train under the guy. Creating a whole Emporor Palpitine/ Darth Vadar thing. Sasuke will kill Kabuto after Sharinganning the hell out of healing techs... When they time comes for the body switch Sasuke turns on Oro and kills him since i figure swapping bodies must take an assing amount of chakra to do... This then set the stage for the final battle, evil sasuke vs naruto.

well that is at least how i would like to see it go down....