I hear some Naruto fans saying stuff like-
Naruto would survive the extraction (which I agree on btw)
and then Naruto would receive some massive powerups that would make him even more OP-
^^This isn't true! If anything, Naruto would remain a sitting duck or more like a support character during the whole fight against Madara.
Kishi is setting up Naruto vs Sasuke at the end on the manga. All the quotes from Itachi, hashirama and Naruto finally being able to understand Sasuke- they are all leading towards that.
Against Obito, even though Sasuke was a huge support, the fight was all about Naruto against a guy who was just like him(Obito)
Now it is time for Sasuke to do the same. He would be the key character in restraining Madara Uchiha(who is very similar to Sasuke)
Naruto would most likely get kurama back, but that would happen after Madara is defeated.
Now you guys just have to watch lord Sasuke in action whether you like it or not.