I don't know if someone's already asked this, but does anyone think Sasuke will revert back to his psychopathic self later on?
The only reason he's back is so he can become Hokage and fix things so stuff like what he and Itachi had to go through won't happen again. He places the blame with the other Kages, rightfully so, and therefor thinks that as the sole Uchiha only he can fix it.
His plan is to stroll back into Konoha, defeat Madara, everyone will love him like they used to and make him Hokage. Literally. I think that is what is in his head. I think in Sasuke's mind defeating the Juubi/Madara = atoning for all the BS he pulled.
What he doesn't realize is everything Naruto learned about swaying peoples hearts. Naruto will try to explain this to him when he gets angry that no one wants him as Hokage after all he's done then they'll have a fight. Will he go batsh*t insane? Unsure. He'd have to unhinge pretty hard if he feels so strongly about what the Kage's told him about the Uchiha that he's defending Konoha. I think in order to go insane again it will take an outside influence since he's a "blank canvas".