Board Thread:Versus Debates/@comment-33229263-20171019104931/@comment-6769189-20171021183657

Actually its not just because the only naturally awakened Rinnegan came from Uchiha, but also the fact that the 2 Ashura descendants retrieved Hagoromos power didnt get a Rinnegan and Hagoromo himself admitted it was a mistake to give all of his power to one child.

So the Indra bloodline is 2/2 on the Rinnegan and 0/2 for 6P sage anything. While Ashura's bloodline has it the other way around. This highly implies that even if the Sharingan and Rinnegan are different dojutsu, Uchiha eyes have both within them.

I dont recall Kabuto saying what modifications he made for what specific reason, just that he theorized that at the very least Madara+Hashi=Rinnegan and he was right, egardless of what process he thought cause the change. Also judging from Danzo's arm they would have guessed that Uchiha+Senju is not the exact formula for a Rinnegan. Oro had performed a lot of experiments with Hashirama's DNA.

What specifically did Zetsu say about Ashuras reincarnations getting the Rinnegan? He may have very well been trying to have them steal some eyes.