Well at one point everyone thought Tobi was Danzou/Obito/Other Stupid Guesses.
But as Tobi himself admitted he is no one. But if he is no one, then he could be anyone. So you.. could be Tobi. Or maybe I am? Or.. Maybe Naruto himself is Tobi? Or maybe not. Maybe Tobi is just an illusion by.. But who would be capable of such an illusion? It could be.. Your mother. She gave your dad an illusion that she wouldn't get pregnant. Or could it be that Madara is your father? then you must be Tobi?
You see I just don't know, nor does anyone else at the moment.
What I do know.. is that you've just been Mind F*cked! xd
And now to finish the job.. Has it occurred to anyone that Tobi might be...
A GIRL?!