Even if he will be 10 times more powerful than Sasuke , I wonder if Naruto has what it takes to fight at full strength against him . I do not see the current Naruto (especially after how he is portrayed in 615 ) being able to fight and attack Sasuke with intent to kill , and if he can not do that , he can not defeat him .
Naruto's goal isn't to kill Sasuke, it's to beat him up and detain him. He wants to save him, not destroy him. Sasuke has an intent to kill because he wants to prove to himself he no longer cares about Naruto and by doing this, he can destroy the village for sure. However, I don't think this means he won't be able to defeat him. He's gonna go all out, just not to kill.
Basically, I don't see much cause for concern. Pretty certain he'll defeat him anyway.