No one noticed that Zetsu and 'Tobi' are one? Chapter 510; we can see Madara's left side of his face. It's the same as Zetsu's right side. That's how Zetsu 'records' fights for Madara, actually he is Madara, so his other half (Tobi) simply remembers what he saw.
Take a moment to understand, but this is probably how it is.
Madara has Obito's Sharingan, that's why he can teleport the same way Kakashi can teleport objects. Because Kakashi has Obito's left eye.
In the arc of Sasuke and Itachi we see ZETSU explain things about the MS. The left and the right eye posses different powers. (Itachi; Left eye [Tsukuyomi] Right Eye [Amaterasu])
Wich explains my theory a little bit more, because why would Zetsu know so much about the Sharingan? He talks about it as if he has it. (Or had it)
Also you see only the black half talking about it. Tobi had two personality's as well, but the dark side (low voice) clearly dominates.
We'll see more, anyhow im quite sure Madara still has at least one sharingan, because he needs the tim-space jutsu
Looking forward to all that will be revealed

Hope im right