I swear, this whole situation keeps going from bad to worst and I know I'm not saying anything that anyone has already said, but Madara is just way to overpowered. I'm just praying that a force that can finally challenge him arrives. I know that when the bad guy is winning, it makes for a good story, but I can't stand it when he keeps winning and the good guys don't even get a small break!
With that said, there is only one way left to defeat Madara that's slightly possible. That mythical fruit that comes for the Shinju (the Ten-Tails tree). There's just no other option and even if they manage to get the yin Kurama into Naruto, it isn't going to make much of a difference. I hate to say this, but Madara is just about a god right now and the only thing that can beat a god is a god.
One thing that could might happen to save Naruto is before Madara can do any damage, Gai and Lee comes and (at least one of them) unleashed all eight gates in order to stall Madara. Yes I know that one of them would die, but there's just about no other option left. Then somehow Obito manages to gain control of himself and forces Black Zetsu (I don't know how he'd do this though, sorry) to give Kurama's chakra to Naruto. This allows Obito to make some form of an atonement for what he's done and finally dies saving Naruto's life.
Sorry for being lengthy, I had to vent. What do you guys think.