The only person successful in controling juubi is SO6P himself and tobis idea in using the ten tails will be a failure due to the fact that its power would be too overwhelming even for a small extent he wont be able to continue eye of the moon plan. But if Madara was there maybe he could help tobi control it for a small amount of time and then he can proceed in his master plan.
but i bet madara would betray him anyway.
but i bet madara would betray him anyway.