Hi, first post in this forum.
I was hoping to see Madara come out of the 6th coffin so I could say... ok I was right, Tobi is Izuna, but now I don't think so. Why? Because he was expecting to be revived.
Unlike the other edo tensei bodies madara was not confused, he was expecting to be resurrected, just not by kabuto's edo tensei but by nagato's rinne tensei, his first words prove that.
Then there's what tobi said, that the rinne tensei was to be used on him, at the time I was under the impression that was a failsafe, in case he died, but now I think that was for bringing the “original madara” back.
I don't know how he can be dead and alive at the same time, maybe he divided his soul, but after reading this chapter I think that Madara and Tobi are not far from the same person.