Quote Originally Posted by littledreamer View Post
could they, in some sense, create an alternate dream-universe in which they could control every aspect of in a God-like sense? By "dream-universe," I mean a rock-solid, extremely stable mental universe that you could return your awareness to at will while lucid.
What do you mean by rock-solid extremely stable? Does this mean you won't wake up unless you want to? Or that you just have full control while you are there?

Quote Originally Posted by littledreamer View Post
What I mean is, is there a way you could block your mind from controlling them consciously, giving them what would seem to be free-will?
You don't control them consciously...dream characters are created by the unconscious mind. They already appear to have this free will, unless you consciously make an effort to exert control over them.