the rinnegan is a mutation it has said before and i think nagato got his from madara he was sayin i think but na itll kill the anime iff naruto got rinnegan....
But what did Madara actually mean by that when he said he gave the Rinnegan to Nagato? He propably can't create Rinnegan eyes. If he could, he wouldn't have to steal Nagato's eyes. He could just create one himeself to replace his lost Sharingan eye and would rather destroy Nagato's before somebody else take and use them against Madara at war.
Another thing... what do we actually know about Naruto's eyes? Even Neji admited back in the Sasuke Retrieval Arc that sometimes Naruto's eyes are better than his own and he's a Hyuga after all. Hidden potential or might the Hyuga Clan have some kinds of unrevealed prophecys?
Personally I doubt that Naruto will awake his own Rinnegan. But then again what kind of power did he get from Itachi and why did Itachi hope that Naruto won't have to make use of it? I don't believe it's some kind of jutsu to counter Sasuke's Mangekyo techniques. So if Itachi's power was the final key for Naruto to get the Rinnegan, what could Itachi be afraid of or even fear? Was it being controlled by the uchiha's hatred? Then being unable to keep his words saving the hidden leaf AND Sasuke? Remember Nagato used to live the ideals of the Sage of the Six Paths and the one of the younger son that love is the key for true peace. That's why Jiraiya had put so much hope into Nagato being the savior of the world. But Nagato had changed after his 2 most painful events and his ideals changed to the one of the older son.
One thing is for sure. There are many similarities between Nagato and Naruto.
Both are from the Uzumaki Clan.
Both received power from an uchiha ( Naruto for sure, Nagato obviously at his very youth).
Both lived the ideals of the Sage of the Six Paths. Naruto throughout his life, Nagato up to his two most painful experiences.
Both experienced very painful events... but... Nagato was able to awake the Rinnegan, Naruto fell for the hatred of the Kyubi and lost his mind. But what would have happend if Naruto hadn't been its host? Who knows...
But I honestly wouldn't be suprised if Naruto awakened a temporary Rinnegan after War to resurrect all the fallen Shinobis.
