Well, if "Tobi" said in previous manga chapters that he saw the senju's will or wahtever burn within naruto, Doesn't that classify Tobi as madara, since it's now proof that naruto has senju blood? It's not like madara had a son and he could see who the senju were
I dont think Tobi can be anyone else than madara at this point, i'm used to being wrong but seeing how madara is like twice as old as everyone, except the elders, only madara can see a true senju. So tobi has to be madara!!