I say that he is, and Madare is Obito. Kakashi's face says it all.

and now Tobi is going to hyperbule Sasuke into believeing that there is another super enemy for the uchiha clan.

bullshit theory #387: Madare will tell Sasuke that the Kyuubi wants to kill the uchiha clan, and that's why he attacked konoha, and the only way to revive the sayian race is by killing naruto and all of konoha's henchman.