I Think Thatobito will get fed up with madara and b ecome the 10 tails host.
But the juubi will be way to powerful for obito to controll and will get out and when that happens obito will die.
During witch kurama will tell naruto how to become the host of the juubi, and than naruto will do as kurama says become the host and beat madara.

Than naruto will talk with the SO6P, and he will tell him how to seal the juubi.

Just a Thought!!