Why do all people think Nagato got Madaras Rinnegan? What if madara just activated the Rinnegan inside of Nagato? Its just when Tobi said he got his Eyes at Kanabi bridge it meant to be activating there.
I kinda think that Nagato is A Madaras Son or B Madaras Experiment to find out how to achieve the Rinnegan.
A:
Uzumaki(Senju relation) + Uchiha = Sage. Maybe then you don't get the Sharingan anymore u instantly gain the Rinnegan, which is the true and ultimate form of the Sage, Jutsus from the Mangekyo Sharingan are kinda like the Rinnegan ability to create things, Izanagi for example, is maybe on close form of it~ Also that ever MS has another special ability comes from the point that the blood get thinner, so i believe the second son who got the eyes, had much more abilitys with his eyes but it after generations this changed and it became weaker and weaker. But if u fuse 2 eyes near blood related u are getting near to the power of the first son, u may achieve new jutsus but still they will be never complete. With the Body of Senju inherited u will be able to achieve further, maybe getting the Rinnegan itself. So if we Assume that Nagato is half Uchiha he got this Body and Soul already in him, which would make him into a thinner blooded Sage with his own Rinnegan~
B: The same as A only that Nagato was not his son maybe just a experiment, that madara did on Nagato to awaken the Rinnegan inside of him. I like A way better.
It would be crazy to assume that madara searched for an uzumaki, because knew he was going to die " shortly before getting the Rinnegan", i mean he can not forsee this, he hadnt have the time to find someone that fast...he have had nagato on his sight much earlier, but why? To give him his Rinnegan? No, i do not believe that he planned that, i mean as i said before how did he know he would die shortly before activating it~