Board Thread:Naruto Discussions/@comment-26006790-20140725193452/@comment-24824148-20140727091323

One of the reasons Sasuke left was because Naruto was starting to overlap his power and he felt he was becoming stagnant. Fast forward in time, the reason he got the mangekyo sharigan was because he wanted to defeat Naruto at full power. The stoic Sasuke that is being betrayed right now wouldn't beat Naruto. Sasuke is at his best when he is emotionally driven and even then there's no guarantee he beats Naruto.