Do you remember how Gaara was controlling the 1-Tails with his "some sort of Allow-Biiju-To-Mess-The-Place-Up technique" ?
Well, in theory, the way Obito and Madara are controlling the Juubi is quite similar, in a way.
And what I mean by expected ending of the Juubi situation is a copy of the following picture:
Why ? Because if you recall to the point where Obito gets unmasked:
It was also a reference to the Haku-Mask situation.
I don't know if this is going to happen or not - a new reference I mean - but it's definitely a high likely possibility.