As of right now it doesn't seem like Madara can still control the 9 tail's, otherwise why hasn't he already done it. I suppose everyone is going to say "The 9 tails has to be in bijuu form in order for him to control it." But then how was Sasuke able to see right through to the 9 tails. Their are plenty of arguments and counter arguments to my theory, but right now, I think Madara can no longer control the 9 tails. This would also explain why Madara is so interested in Sasuke. Maybe he has been grooming Sasuke from the time he was a child so he could take Sasuke's eyes.
Anyway debate and decide for yourselves if my theory is correct.