Their VERY first move when they fight(actual action taking place)
either one of the following
1- Sasuke charges, swings sword, Naruto dodges, and counters
2- Naruto charges, Throws fist of Omega, Sasuke dodeges, and counters
3- Sasuke turns on Sharingan(I dont think Naruto will kick things off with Sage Mode)
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How I think Sage Mode will Enter the fight
-Sasuke clokes and lifts Naruto like he did the first time they fought
-Sasuke Chidori's Naruto
-Chidori doesnt pierce through
-Sasuke: D:
-Naruto shows sage eyes
-Naruto gives Sasuke a Falson PAWNCH
and then after getting thrashed around by Sage Mode Sasuke Activates his MS and Naruto after a while of MS dodging goes Kyuubi Mode, Then Sasuke bitches out and uses Susanoo, Then(HOPEFULLY), Naruto turns to the kyuubi and eats Susanoo
-Sasuke: NOOOOOOOOOOOOOOO
-Naruto hits Sasuke with a RS then everyone is happy
Now add talking to what i just said and you've got the whole fight right there
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I want Sasuke to get hit with a rasengan but only survive cuz of Susanoo