Maybe .....

Gamabunta will settled this ...
Frog boss is summoned , he catch Sasuke with his tong and hold him inside his throat .
That's the simple way ....

Or we'll get some super fight; Sasuke turn Super Wild and Naruto increase his Kyuubi Side and loose control for a frw moment.
*Take cover !*

Or kishimoto will gave us some super Naruto Chapter ...

Sakura will maybe put an end to this fight (like on the roof of this Hospital ...)
She will think "I can't let the ones I loves kill each others , I must do something .." Sakura jump in the battle , but this time no kakashi to recuse her and °°Bang°° She dies ...
Naruto and Sasuke come back to normal