A shame so much of this war has been off-panel. I kind of think the Kages will all survive, since an off-panel fight doesn't seem worthy for a main character death. Plus Kishi seems averted to killing anyone in this "war". I hoped the Anime might extend the fights so we see it all in detail, but no, obviously not. They're making up their own lame filler fights. Plus they'd just cock it up anyway a la Naruto vs Pain.
I guess we'll start to get the explanation we all crave next chapter. I agree, Obito must have some special quality for Madara to want him. Or perhaps Madara is quite weak here, so Obito was all he could get. I do wonder how Madara found out about him, and then twisted him.
Also, this old Madara, I suppose this is what Kabuto meant when he said he revived him in his prime. Weird he can mess with the Edo Tensei like that, and yet he didn't bother with Nagato. Feels like a bit of an asspull. Could've just made old Madara absorb someone as Nagato did with Naruto. But it leads me to wonder how much Edo Tensei can be modified.
I guess Obito will turn good, seems like the obvious thing now, and Kishi's been incredibly obvious lately. No idea what will happen with Madara & the Ten Tails though. Nor Sasuke & Oro, or Kabuto if he still has a part to play. I'd assume so as he was spared.