The hooded figure seems to feed off of the rippling destruction of the act more than the act itself.
he loves to have powerful and mysterious figures show up over and over, often with totally different names and forms, only to reveal in one of the The Dark Tower books that it's actually the same person.
They've mostly gone there already but I'd expect a bit more of the "what if the things we've called Devils throughout history have just been these awful warlock things?"