Up until now I had the idea that Naruto would eventually gain Rinnegan assuming that Senju + Uchiha is enough, specially with the crow Itachi gave to him. When the crow was burned I was like "ok there goes the Uchiha power, but assuming the Uzumaki are some hybrid clan or something he might get it, after all Nagato was an Uzumaki".
But now we know that Nagato was basically Kakashi's version of Rinnegan, Madara is the first on to truly use it, it seems to require EMS to be able to use it fully so you can evolve it into Rinnegan and with the Rinnegan cast crazy techniques like the metheor. When I saw Naruto's chakra mode being a carbon copy of Rikudou's body I thought that simply at the final fight Naruto would awaken Rinnegan, put that into his body and he is equal to RS.
But right now it seems that it is Sasuke who will get Rinnegan, so the final battle of Naruto and Sasuke, Naruto is going to be fighting an equivalent of this Madara, but not only that assuming Naruto gets some power-up to be able to compete with Sasuke, how is he going to be able to compete against the final villain?
Remembr this is only A PART of RS's power, the final villain is going to be the complete thing, it appears that to be able to even match Rinnegan Madara which is possibly what Sasuke will be, Naruto is going to need to combine SM and RM (the Kyuubi chakra mode). How is he going to even touch the final villain?