Tobi and Madara know each other. Madara was expecting to be revived by Tobi and was surprised to see that he was back through Edo Tensei. Tobi didn't want Madara to be revived or at least not yet. The latest chapters seem to point at Tobi being Obito. If Tobi is Obito, how do you guys think he met Madara? Did Madara revive him with the Rinnegan? If not, does that mean the Rinnegan was not used to revive someone? Do you think Obito was evil before Madara's death? Perhaps he became evil after possibly taking Madara's eyes, the Rinnegan eyes. A promise was made to revive Madara it seems, but Obito had other plans after realizing what is possible with the Rinnegan?