Hm, funny but I went to see a thread and never noticed that Obito always got this and never stopped by whatever happens. Like "Alliance no Jutsu!" then, "Well, they're dying!" Then you got "Me and dad got this!", only to go "My chakra!!!" So that said it really sounds like this attack might fail but let's see what happens. Personally, I want Obito to go down as a "Not stopping! Not yet!" rather than "Well, this sucks..." Maybe that's why I like it because it feels like a villain with a hero persona traits, mainly not stopping when it feels like it's game over. We'll see.
Another reason why this combo attack has less chance of defeating Obito. I believe Obito has become something that can't be defeated physically. I mean that you have to go about a roundabout way of defeating him like attack the source of his power rather than himself kind of situations. That's why this attack will be stopped, offering another way of defeating Obito, by somehow cutting off his God-like powers. That's why, I'm hoping Naruto gets a vision of how the Sage dealt with Juubi, or meet him in someway. I doubt this fight is going to end with power clashing against power. In fact the way this combo is set up is doomed to fail.
I agree, I was always open-minded about SasuKarin and I still think it's possible, but until or unless Kishi starts treating Karin seriously and not like some bad joke, I can't and won't take her or the pairing seriously. Honestly, whatever happened to the girl who wasn't afraid to give Sasuke what-for? I know she was meant to sound angry when Sasuke apologized and she called him a bastard or something when she was going on about licking him or whatever, but that just doesn't quite do it for me. 
I have yet to lose hope on Kishimoto handling Karin well. Mostly, the situations she's been placed at are for comedy as I agree with others, it really isn't funny, but I doubt she will end there. I mean I doubt Kishimoto put up the warm chakra (Naruto) and cold chakra (Sasuke) comparison for no reason.
Question: if the moon eye plan happens, exactly what happens to the bodies?
The Infinite Tsukiyomi is more like Hypnotism than permanent sleep. In a way, everyone would be sleeping, but in a trance, they would still move around, but their actions and what they experience would always be controlled by the castor.