I think that this arc will result in sasuke coming back to leaf. I dont think there's any chance of sasuke just being gone w/ oro and no one caring. Also the fight wont be just like 2 chapters long. The longer the fight is, i think the better chance that Sasuke will change after

1. Sasuke is losing to naruto
2. Naruto keeps on getting up after getting beat, then gets in 1 lucky powerful shot