Re: An in-depth look at Tobi and the Manga
Not as likely as you make it sound. How would the Elder son have survived all these years? The full abilities of the Gedo Mazo are at best vague and shady at this point in the manga. All we know is, a rinnegan user is required to awaken it, once awakened it can be used to seal tailed beasts and the Akatsuki used Nagato like a pawn to sync with it. An ideal rinnegan user has massive stamina, which is probably why Nagato was chosen as he was an Uzumaki.
Tobi knowing history could very well be just the result of the reading the stone tablets at the Uchiha shrine. What exactly is written there, no one knows but the fact that there are parts of it that only a rinnegan can read has to mean there is info on the Sage/his life/his sons contained therein. And lets face it, if you say he 'sounds like he lived through that' then by that evidence he is more likely to be Madara as he gave vivid accounts of the time of the founding of Konoha and his fight with Hashirama, but of course that is impossible as we know Madara was dead.
And it does'nt seem even a little strange to you that the Sage of 6 Paths himself, who had all the powers of the Elder son plus many more(younger son's abilities),failed to find a way to stay alive beyond his years yet his son with half his power succeeded? Where's the logic in this?
If it even were to be accepted, which is unlikely because he lived a loooong time ago, then why have'nt we heard of the Elder son before? In the days of the founding of Konoha, or any of the 3 great wars? Where was the Elder Son then? He could have done much more damage by attacking Konoha at its founding by siding with Uchiha Madara at the Valley of the end against Hashirama, and ended the Senjus right there instead of waiting all this time.
Oh, and the Elder son of the SO6P from who spawned probably the strongest ninja clan ever, is anything but a 'nobody'(what Tobi said). He does'nt need to use the name of Madara who for him should be the equivalent of an upstart lil' kid.