I assume only 3 Avalible theories on who's Tobi. Btw My favourite character Madara has been ressurected, I'm so freaky happy.
Lets get this ove with here is the theories names or etc, you can find them in this thread..
1. Tobi is Madara's brother Izuna Uchiha, thats the theory I believe most.
There's alot of things you can say to prove this theory.
2. Tobi is the son on SO6P, the one with the eyes.. It's still possibility.
U see, Tobi once said " Those eyes belonged to my in the first place " and " I'm the one who gave nagato rinnengan " or something like that, and he Meant Rinnengan..
3. Tobi is the Madara's made clone/baby, that has to end his job and ressurect him.
I mean like just before death madara made "tobi" and said like " End the job for me, and when you are done, ressurect me with Nagato " or something like that..
And Ou ye the worst theory is that tobi is Obito CAMON its a trully BULLSHIT.. Theres just 0 precent chance I rather believe that Tobi is Sasuke father than Obito -_- thats just impossible same goes for Shisui.. If you have any good theories to add spit it out..

Theres my top3 most believible ones.
Srr for bad english.. :lili: