Re: who is tht mask guy if he's not madara uchiha?
here is my thory the mask guy is mandera splite body if u remember he mention that nagato betray him when he use the the jutsu to bring death to life why he said that? Becze he want nagato to to use that jutsu to resurrect his other splite body so he can marge them to be a complete mandera
With the compliments of ex killer theory I place my own.
I had my theory that tobi is Madara younger brother but noticing the hints of the story.
Tobi isn't obito because obito could not have fought the 4th Minato on the day of naruto birth so please think about that.
Tobi isn't a zetsu in countless manga's you see zetsu speaking with Tobi.
Tobi knows a lot about the Uchiha history what is written on the sacred scrolls in Konoha and whats not, Tobi is indeed Madara. But the idea of how the two are linked now comes to light.
In manga 553 Naruto fights Muu-Sama and defeats him with a Rasengan only to find out in 558 that he is still mobile and out there. He split himself in two.
I strongly believe that Madara died at the battle with the 1st or shortly after but his body was split, or someone split him. Could be a zetsu or someone else there at the time.
The Madara who has been brought back by IWR knows not that his other half is roaming free, the split half is weaker than the original thus the statements of (i'm just a former shell of myself). The original or stronger half wasn't sealed but killed why Tobi(weaker half like kabuto mentions about Muu-sama) needed Nagato Renne Tensei to revive his main body.
Tobi shown at time with Itachi with long hair just indicates that the split half of Madara which is Tobi is just identical to the original.
Tobi cut his hair and change he's appearance to just link with the Akatsuki remember the Akatsuki was formed by Nagato not Tobi
The fact that Tobi mentions that he gave Nagato his eyes goes to this.......
During the battle in which Tobi fights Minato and frees the 9 tail beast/kyubi Tobi is amazed by Kushina naruto Mom resilience to die. I believe he sought out the Uzumaki clan afterwards, maybe he slaughtered them like he did his clans men or ran tests on them, whatever he did gave purpose to Nagato being born with the Rinengan
or
Nagato could have been his own child mix by two bloodlines Uchiha & Uzumaki knowing the twisted bastard that he is anything is possible (Muu-Sama summons the coffin and calls out Ngghhkk so he must have thought that Madara is Nagato because they look one in the same) Why else would he make a mistake like that in identity???
Now why was Tobi psyched when Kabuto approached him and showed him the coffin? As i first suggested the separation/split of Madara would show each of them would have an individual subconscious mind and since the split half is weaker than the original well the split would be terrified of fighting himself.
The only real question about everything is how has Tobi managed to live this long, what is that secret???