Re: if sasuke kills the hokage...
Sasuke will lose for a number of reasons.
In fact if Sasuke wins it would be completely retarded.
Let's check the facts
1.Danzo is a Hokage level ninja, he was accepted as Hokage, and can actually make himself hokage if he wishes to, while he's nothing special per se (3rd beat him) he must be powerful.
2.Sasuke lost against 8tails 3 times, and even then 8tails escaped and outsmarted sasuke AND his bum chums. Raikage is stronger than killerbee, who wants to kill Sasuke
3.Sasuke is going to assasinate someone with 5 kages and a samurai (who is more powerful than all 5 put together) in his way.
If sasuke wins he's the strongest ninja EVER.
Maybe the kages will discuss the Uchiha clan more and sasuke learns tobi has been lying to him and decides to kill zetsu instead or something.
I don't see him pulling off a successful assasination in front of a samurai guarded fortress with all 5 kages inside.
He is going to be raped a new one