That was his main plan from the beginning, once he knew that the Uchiha rebelled on the village. And his village vandalism acts were huge and pointless. He thought how can I return without being raped by a lot of villagers ? Thats right revive their beloved hokages, by doing that they will love me.
yea because tsunade is hokage so if she lives she will let him back. Hell she didn't even classify him as a missing nin when he was doing all sorts crap, because she wanted naruto to save him. No wonder the village was destroyed
With Naruto (his best friend) as future hokage and savior of the NV, "the whole who ever stopped Edo Tensei will be known as a hero thing,"(that line screamed plot) and Sasuke assisting in the war w/ past hokages. Who is gonna stop him?