Lol you're worried about orochimaru becoming hokage, if anything you should worry about saauke, if sasuke actually became hokage then the rest if the world simply gets blitzed by batman sasuke, Sasuke would have not only manhandled all the tail beasts but Naruto would be dead and he most likely would have taken his power that the sage fave him. Sasuke's eyes would've evolved and he would have indra+Ashura+Hagoromo's+The tail beasts under his power. Sasuke would've been the second coming of the safe the chaotic neutral version. Then when fodderneri comes with his tenseigan sasuke would've begged him and took hamura's chakra too and toneri's tenseigan. Sasuke would've had power that rivaled or had been greatr than kaguya herself. He would've simply God Negged every incarnation of anybody in narutoverse. Kishimoto forsaw this and didn't want to give saauke two arms to further nerd him. Dat sasuke. Thank you for reading the fanfic