In manga 561 page #2 Madara makes it clear he knows the IWR and it's original purpose.........Tobi was clueless when Kabuto showed him his Edos, even called him a "madman" for reviving Madara. Conclusion, Tobi isn't Madara in any form. He's either Izuna or the SOSP in Obito's body who knows. And who could be so strong that the
second was willing to sacrifice his live to destroy it?
second was willing to sacrifice his live to destroy it?