Spoilers for Dream guardian:
It just doesn't make sense to me that the Emporer, given who he is, would go over to the nether brain. He created the city, now he's gonna help destroy it? Seriously? Who thinks like that?
It's so illogical it's painful.
I could go on and on about the ending. There's no denouement at all, and every story needs a denouement.
I'm a writer/editor/writing teacher and omg do I ever want to sit whoever wrote those end scenes down to a writing 101 class. Sheesh.