More than anything this can be predicted by anyone but in the battle. If naruto were to somehow take the form of the sage and goes one on one with juubito would be freaking epic! Can you imagine the jutsu they would use against one another if that were to happen? Maybe sasuke would fuse with Naruto or something or the sage appears and grants naruto some of his power? I dunno.... What would the last epic moment be before juubito would be defeated? In other words how will naruto get the power to defeat juubito