I really hope that Kishi doesn't let Madara get all of the Tailed Beasts again.
It would just be too repetitive. There is absolutely no way that the Alliance could face off against Madara as the Juubi's Jinchuriki. He is exponentially more powerful and more experienced than Obito. If you think about it, Obito has always been kind of a runt, and this holds true even now. The only real reason that Obito was defeated was because of his inexperience and his childish ideologies. I doubt that Madara has the same such weaknesses.
Furthermore, Madara can't win, and Naruto can't die (permanently). Therefore, regardless of what happens, Madara will eventually be defeated. I would like to see something other than what we just saw happen to Obito.
I'm pretty sure that Obito will get a chance to redeem himself at some point. One possibility is perhaps Naruto does die. Obito sacrifices himself to bring Naruto back. Or maybe, Obito uses his Rinnegan to bring somebody else back. Two of the Sannin have been pretty much brought back to life. Maybe it's Jiraiya's turn. Or since Madara is now alive, maybe Hashirama will be brought back, too. I really don't know, but I see Obito having a significant role in defeating Madara (or at least saving the Alliance from him).
Another possibility is that the Tailed Beasts all decide to seal themselves within Naruto. Since they aren't being forced into a Jinchuriki, maybe this will result in a better seal. The only problem with this is that I don't see Naruto becoming the Juubi's Jinchuriki or even getting that big of a power boost. Perhaps, all of the Jinchuriki are brought back (again, Obito has a use) and all of the Tailed Beasts rejoin their Jinchuriki.
Regardless of what happens, at least Naruto and Bee are going to break free from Madara's grasp.