This is where the duality between dream/illusion vs. reality starts to break down. Those having experience lucid dreaming know that what is dream/illusion and what is real starts to break down. If you go the full distance dream/illusion = reality.
From the perspective of your dream characters, how many "dreamers" are there? Just ONE - Joker_Theory. . . Joker_Theory is the dream. if we take it one level higher, Joker_Theory (and all people, animals, things) is God. Joker_Theory is within Everything, similar to how Everything in the dream is You.