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I don't know how the 2010 movie ended, so I don't know if there was no room open for a sequel, or if this is going to be an entirely new plot. However, I just can't forsee them not having Belial around. Belial is a pretty popular adversary right now. I don't think Tsyburaya would let their newly "reborn" heroes of Jun-bot, Glen Fire and Mirror Knight not return again. Though anything can happen.

With that said, I can foresee that Zero will be in it, and he isn't going very far without his dad, and no Ultra movie is complete in these times unless the first Ultraman is there as well. Father and Mother along with Taro is a great possibility as well.

EDIT: Changed thread title from "2011" to "2012" based on future information revealed and discussed in the thread.