Did Oro raise an edo Madara or Izuna or some powerful but dead Uchiha for that matter and while he was experimenting with the Hashirama cells?
Oro raised first and second hokage while fighting the third but didn't try for any elite Uchiha. Unlike Kabuto, he also took complete control of them almost immediately.
Is it possible that he tried raising an Uchiha first ( since he was kind of obsessed with sharingan) and maybe didn't control it fully from the start and that Uchiha being Madara got out of his conrol?
1- Minato asked him if he was Madara, because anyone else didn't make sense to him to have that much power and ability to cross barriers of Konoha without any difficulty. But, he also addressed him as the masked man..
2- Madara acts like Madara but also talk about himself in third person. Zetsu calls him Tobi. He didn't seem to be very fond of Oro- he was shown cursing him mentally and wondering how much he knew. The sixth coffin is somehow related with him..
3-Oro was the scientist and probably the one who worked for Madara researching on Hashirama's cells. We really do not have enough evidense yet about Madara's medical and sceitific research abilities. Oro was in Akatsuki at the time of Uchiha massacre. So Madara might have had his help in setting up that sharingan storage etc.
That maybe one reason Madara asked Kabuto how edo's work and also the reason why Kishi keeps Oro alive and not fully sealed in Totsuka either.
Yeah I am probably bored but I hope we will learn the sixth coffin thing next week.
So please post away your views..