Alright, I like the concept, but it needs to be fleshed out a LOT more. First, for some STRANGE reason, I'm getting a Sandman (Neil Gaimon) feel here, and it's making me all tingly inside. So I like it already. But we'll need more. Dreams are big...and can be anything. What would be the method of fighting back? How would we survive when we can't tell dream from reality? Once we realize the two are separate...once you realize it is only a dream, it cannot hurt you, and the story ends. There has to be some other aspect to that... Is magic or technology involved? Would we manifest weapons/magic based on personality within a dream world? Would be bring our own nightmares into the world with us? Cross minds? It's a good start! Keep going!