I don't actually believe this to be a one man scenario. I think it will be a joint effort from the
Allied Shinobi Forces 
.
I wouldn't make sense for the Army to show up for Naruto to all of a sudden kill them. It would make them look weak which i don't think it kishimoto's intentions, i believe it's time for the Allied Shinobi Forces to show their combined strength. Kish also has to think about "
Madara", he was made out to be an incredible ninja, that even the mention of his name brought frightening expressions to peoples faces.
He can't have Naruto beating him single handily either, or that would destroy the reputation of the so called "
Madara."