I thought I'd join in on this "Naruto will be the next so6p" or "Sasuke will be the next so6p" stuff.
Clearly, Naruto is the only one(who is actually alive, rather than an edo tensei; Madara) whose power is nearer to the s06p's. BUT, he does not have the Rinnegan, or visual powers in general. So now, Naruto only has the Chakra, not the eye power. IF he had both of them, which I doubt he'll gain sometime soon(if he thinks about transplanting Madara's eyes IF he defeats him) then yeah, he might be the next s06p.
So right now, we honestly wont know until Kishi pulls some weird shit. Like Naruto's new bijuu mode. Wanna see the features and commonness?
Naruto So6p
Has horns coming out his head Has horns, normally
Has magatamas around his "chakra coat" and inside of it Also has magatamas.
Problem?