A lot of comparisons are being drawn to the 2011 OVA of Naruto VS Sasuke.
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Now consider how that OVA ended with Naruto's headband discarded.
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I think we'll see something similar with the two of them ending the fight either in a draw or a little more conclusively (preferably).
At the end of the OVA Sasuke is seen picking him himself up and smiling (albeit sinisterly), I can imagine him leaving without a word, but that begs the question of how the IT would be released if he just left. I still get the feeling Naruto is going to grab his hand and force him to create a seal with him, thus burning his own arm in the process.
Wait, do Kakashi (maybe) and Sakura even know where they went off to? All Kakashi knows is that they went "that way", and then explosions. I don't see Sakura even attempting to get to VOTE, she'll just be waiting, hoping that Naruto brings back the Sauce.
Do any of watch Sawyer7mage? His latest Naruto video basically described how likely SasuSaku is right now. And it was perfect.
I think Kakashi knows where they went considering the direction they headed and the fact he recovered Naruto at the Valley after the first fight in Part I.