When Madara gets the upper hand on Naruto, I think it'd be fitting for Sasuke to deflect Madara attack to save Naruto. Then will see Sasuke ultimate power since we will have already witness Naruto's new power. From the direction they are going with, I think Sasuke will be Hokage and have Naruto as his second in command. Kishi is definitely planning something for these two guys so they can put an end to the war together.