Originally posted by TheAuraAngel
I assume he does that to remain in disguise. And wouldn't it?You showed precedent for the Sage doing it. Not Madara. Remember, for this theory to be correct, Madara would be on the verge of death after the battle with Hashirama, used his cells in conjunction with the sharingan on the fly, and then created a brand new being out of his own soul. He would have to do this on the fly while dying.
Their powers are different. They themselves don't seem very different. Feral animals except for Hachibi and Kyuubi, cause they could talk. And all of them rampage, except for Hachibi, who was domesticated.
And this theory does not explain how the newly revived Madara would know who Nagato was, considering he was dead before Nagato, heck maybe even Nagato's parents, were born. If he didn't die at the VoE, that means he died in the intervening time but how would that happen? You mentioned it being connected to the Sanbi but....how would that work? If Madara died during the release of the Sanbi or whatever, they'd surely know it was Madara unless he didn't leave a body behind. He would also have to be wearing his favorite armor that day for no particular reason.
This is a wild guess and will probably be proven wrong next chapter, but here's how I see it having gone down:
Uchiha Madara escaped the VotE alive, but steals DNA. I don't know how he managed to survive, maybe he figured out Izanagi "on the fly" like you said, or maybe it was some unknown justu, or they simply mistook him for dead. He went out on his own, and under some unknown scenario was compelled to divide himself into two. This happened at an unknown point, but probably not that recently. These two existed for a span, and then this version died off some time after Nagato became involved in their plans. Meanwhile the other half lived on.
I think Madara was wearing his armor during the Sanbi incident. He is in shadows on the panel, but they have the same hair at least. He couldn't have been masked like Tobi (either version) because then Kisame would have recognized him right away. But Kisame only recognized him once he removed the mask.