from my point of view, madara is just a prelude for tobi's coming,. Kabuto's going to use madara to fight tobi,. Why would he say to madara that tobi has other plans,. Kabuto wants it all, incredible as madara is,. He is just a pawn,. From the start of the series tobi is the main anta, he controled akatsuki, waged war against the shinobi world, using madara's name ofcourse, he played them all,. Either madara's gona be sealed and tobi arrives, or tobi's gona suck madara in a pocket dimension if ofcourse kabutos gona betray tobi and have madara kill him and he will knowing kabuto, yes tobi was weaker than madara b4 he got the rinnegan, that shell has now acquired a rinnegan, 7 bijuus power trapped in gedo mazo, and space time tech, who needs susano if your intangible, tobi s/t tech= ultimate def + ultimate 1hit + rin powers = madara gone