I wouldn't count Obito out yet... Especially since he apparently wanted a world where he could have stayed in Konoha and stuff... How he would have wanted things to be different...
However, I think his time as the main antagonist is about over. Madara has probably scoffed at Sasuke copycatting him, and probably jokes, "Like student like teacher..."
But this early in the morning, I hope I wasn't the only one totally getting odd sensual vibes and connotation from Sasuke saying: "Does this feel the same as what Madara did in the past...?" Considering Kurama and Madara history, I'm pretty sure that could be taken in so many ways...
All in all, this only strengthens my resolve that Obito is going to switch sides before he dies on this battlefield, if he even dies. And after this, every susano'o is going to start coating themselves in a mixture of themselves and their full biju form.