Comprehensive analysis on who Tobi really is..
So, first off, I wanna start by saying that I really have no idea who he is. I want to say someone of the earlier Uchiha clan (Madara, or elder sons) but, did anyone else find Tobi's behavior a bit odd from an Uchiha, when he was first introduced in the manga/anime? Leading me to believe that he isn't an Uchiha.
Also, we know that Itachi KNEW who TOBI was (Itachi believes, or says, that he is Madara, but he could very well be wrong) And we also know that Tobi has Madara's eyes. (Itachi set Sasuke's Amaratsu to activate upon seeing Madara's sharingan.) But was Itachi fooled? Also, could Itachi have thought that they were Madara's eyes, but were mistaken? Itachi is a genius ninja, and I hate to have to call him out, but he could have very well been played by "Tobi" (Tobi once said that if Itachi actually knew about him, he would be dead)
So basically, this leaves us with "WHO THE F*CK IS THIS GUY"
We know Tobi has been around for a VERY long time. He knows about the elder sons, BUT could he have been an ordinary Uchiha that read about the sons in the Book they found (forget what it's called or where it is, but it has the secrets of the Uchihas.) So, this leaves us with the question..
"HOW OLD IS THIS GUY?"
We know he's very knowlegable, and judging by his teleportation justu that Minato claimed better than his FTG (Even though Minato was smarter than him, and a better shinobi, in my opinion) Leaving him with the greatest teleportation jutsu in the narutoverse.
Now, this leads us to the question...
"How the hell does an UCHIHA get a teleportation jutsu that is unrivaled?"
You could say many things, because he unlocked the rinnegan, etc.. But I honestly don't think that Madara obtained this because how would he have lost the fight against Hashirima with that kind of jutsu?
Well, there was only one person that I can recall with a teleportation jutsu.. and that was Shisui.
And this basically opens up huge doors. Did Shisui survive? Could it be possible that he completely played the entire Konaha village? He was a master of genjutsu, and I don't think it's entirely impossible. In this one speculation, I think it's possible Shisui gave up both of his eyes, BECAUSE HE KNEW WHERE'S MADARA'S CORPSE WAS. And after that, obtained his eyes. This could leave you to wonder, that maybe that's why Itachi and him worked together, but Itachi had no idea. This is just a branched off speculation.
Now, moving on. Tobi as we know, has a hard on for Sasuke and Naruto fighting. Why is this? My question is why is he pumping Sasuke up with powerups, just so he could beat Naruto in a fight. Claiming it's DESTINY, and FATE for them to fight. My only guess is, he wants revenge on the Uzamaki clan. (aka, younger sons clan) Which if he is Madara, or the elder son, basically gives him that motive. (Since in the grand scheme of things, his moon's eye plan, everyone will be controlled by him.)
Sooo, we know that he said "He gave Negato the rinnegan" And now that he's dead, we know that he's not the child of prophecy.
And here's something I thought about that could be mind-blowing...
"Who gave So6P rinnegan?"
He got it after fighting with the Juubi right? So, in some way shape or form, I think Tobi could actually be a fragment of the So6P or somehow a human version or the Juubi. Also, how the hell did he "Give" him the rinnegan? Which can totally disprove this if he didn't.
But, something I must add to my recent theory, or speculation, is why does Tobi keep one sharigan (normal 3 magatama) and in the other eye rinnegan?
And i'll leave off with this question, because i'm tired. But i will add more analysis when I get the chance..
"What's the 3 magatama sharigan and the rinnegan combined look like?"
Pretty sure you all know, it's the Juubi's eye.