Sasuke kinda had no choice but to side with the Kages.

[Durante]

Think about it, if Sasuke said "nah im still gonna kill these Leaf ni66as" Hashirama would've just destroyed him right here.

That's not why he chose that, it's because if he had done otherwise, his role in this story would have come to an end..

 

[Totsuka gg Amaterasu gg]

Good point, didn't consider Orochimaru using the Kages against him, but he would without a doubt do all he could. Even if he is outnumbered they would have a hard time bringing down a shinobi god.

100+ hands / person

 

[Almighty Ra]

Hashirama was able to move from edo ..for pete's sake it's his cells that are giving the jutsu the strength..If Sasuke wouldn't have changed his theory it would have been Hashirama vs 3 Hokages, Taka, Oro & Sasuke dead

 

[Nous]

He made the desicion alone. But it is true - had he said I will destroy Konoha, I doubt Hashirama would remain neutral

 

[Makoto]

Good point, didn't consider Orochimaru using the Kages against him, but he would without a doubt do all he could. Even if he is outnumbered they would have a hard time bringing down a shinobi god.

Let's not forget Hiruzen is also a God of Shinobi. xD

 

[FourthLegacy]

then orochimaru would cancel the edo

Hashirama broke through it without trying
Dont revive the first and enhance edo control with his DNA, it won't work on him.