Under the new rules the superdelegates don't get to vote in the first round, but do in the second, and I think all delegates are released. Sanders would have to be damn close to 50% in the first round to have any shot under those circumstances. He's nowhere near that now, with the moderates split, playing in his own backyard. Whoever is the leading moderate would get it, and it would get sticky if two of them are close. And yes, there would be some screaming going on.

Best guess is Biden and Warren drop out before super Tuesday, when Bloomberg comes in. By that time either Amy or Pete should have established a clear lead over the other, and it will come down the that one, Bloomberg, and Sanders.