I think its totally plausible that sasuke could become hokage.
Only because, this is naruto, and they forgive everybody. >3>...
Sasuke will be redeemed, and he WILL get at least the CHANCE to go for the hokage title. Why? Cause this is naruto. XD I mean, this would never happen in a real life scenario, but hey, I'm willing to let that slide only because I've been waiting so long for Sasuke to redeem himself.
...just wish Kishi hadn't exaggerated all those events with sasuke.
I mean its not like death is forever in this world.