I don't see why Sasuke being Hokage is so far fetched. Look at Gaara. Just two and a half years prior, he murdered his own people for the lulz. Now it's like he's justin beiber and the villagers are little girls. Besides, he never did anything horribly wrong, not against Konoha at the very least, and his actions in bringing back Orochimauru and the Kage saved them all. Without him, there would be no alliance let alone Konoha, and were it not for his whim, he would have destroyed Konoha when he went there. What's more, he understands the villages worth, so he would make a perfect Hokage.