I believe the original plan was to use the Juubi's chakra to resurrect Madara. Tobi, however, will capture Bee, and use the chakra of 8 tailed beasts to extend the time limit enough to resurrect Madara. Just my prediction.If that were the case he 'probably' could have done it long ago. 7 tailed beasts have much more chakra then nagato and he recently obtained the rinnegan. Tobi's main goal is to become complete/eye of moon plan, how could madara contribute to these plans?
Madara must be allied with tobi, but just using extra chakra seems too simple to get the technique to work. What was the point of all those zetsu's? Unless Tobi is still unable to use the rinnegan to its full capabilities then this seems unlikely, but not impossible.
It's a plot no jutsu troll that Kishi put as convenient excuse for any abrupt illogical unacceptable changes in the manga!It fakes your destiny, no matter what happens.
i would lol so hard if thats what goin to happen ...but we dont know if it is impossible eitherHe could use that rinnegan jutsu to resurrect himself before he goes because he is not technically alive