Here is how I would write the story line:


Naruto fails to turn Sasuke back. Sasuke retreats.

A few weeks later, the final confrontation happens between Madara & Sasuke against Konoha.

Naruto kills Madara. Naruto fails to turn Sasuke back a second time and is forced to kill him as well.

The 5th Hokage comes out of the coma, but retires due to injuries.

Naruto is offered the Hokage position by the Village.

But depressed over his failure, Naruto leaves the village and becomes a hermit sage like his teacher before him.