Iv know Naruto was serious before but.....we all know how he gets when comrades die or get severely injured. He's gonna go all out with sasuke.i doubt he will even smile again during the fight. Everybody...prepare for the real battle to begin!
It's possible....the kages are on there way to the battlefield with Jutsu from sageWell, I already predicted that Kaguya will be sealed before ch. 690, so...