It's either a clone
There will be interference from team 7.
Sasuke will stop his hand.
I lean more towards Sasuke stopping his attack mainly because it seems we are seeing more of this fight from Sasuke's perspective than usual. You can see the emotional turmoil going within him as he desperately wants this fight to be over with now that Naruto is taking him seriously. He wants it to be done with because he's going through killing his best friend, something he couldn't do before. To me, it seems like Sasuke would stop and tell Naruto how he can't go through with it. And then the TnJ will proceed.
But it could just be a clone and Naruto wins, many people are speculating the clone (which is reasonable) but it seems to cliche to me, and the fact that it was Sasuke who heard how Hashirama deceived Madara, I find it off that Sasuke will fall for the same trick