the person I'm suggesting would be, to this point, a completely unknown character. Tobi could be someone who was close to the original Uchiha clan and received his eyes when a death occurred. I would assume motives and such would be explained when the reveal takes place.
The story about how "Tobi" got his eyes could have been passed down to younger Uchiha members over the years and that would be how Obito knew it was possible to give the eye(s) to a non-Uchiha.
heh.
Ulysses is kewler than Odysseus. For one simple fact: