Board Thread:Theories and Speculation/@comment-27821284-20160218113714/@comment-26369387-20160218123447

^Thing is, it's not Senju+Uchiha chakra that awakens Rinnegan, it's Asura+Indra chakra(which = Hagoromo's chakra) that awakens Rinnegan. Reincarnations of Asura and Indra have their chakra, which is why Madara managed to awaken Rinnegan with Hashirama's DNA.

So potentially Naruto could awake Rinnegan if he had Sasuke's Sharingan implanted on his eyes.