Before you guys go bashing the OP, there is a lot of thought to this theory, especially since Kishi likes surprised.
However, Naruto has been saying since day one that he will become be greatest Hokage and surpass them all. Naruto has a best friend/"rival" in Konohamaru who also wants the title but secretly knows Naruto is a goliath hard to overcome.
Sasuke may or may not want to destroy Konoha or change the ninja world in some way. Sasuke does not have trust of anyone in the ninja world (no thanks to Konoha's orders to Itachi and Itachi's cruelty to his own brother) by joining the Akatsuki and attempting to take the life of all the Kages.
A lot will have to happen for Sasuke to become Hokage.