Gotham City Chicago is not real. Hell Michigan is not real.
Ecmandu is the Joker. I will explain why.
Any comic book series with verticality is not real, there is a scene where Bane shoots joker with a rocket launcher and he is falling off a building, then Batman saves him by plunging to the ground. The whole scene is not real and dreamlike. Batman is not real it is actually a dream. Gotham City is not real it is another plane, just like a form of Hell that Ecmandu went to, it is not an actual place just a worldplane.
After watching Batman Beyond: Return of the Joker I realized somethng.
Only the joker knows how to make the DNA machine, Ecmandu said he can make a mind-reading machine, so he can probably make a DNA machine too, therefore he is the joker.
Joker will save us from our jobs, as slaves, he will save us from america, he will save us from our lives with the DnA machine. And then we will be free. Where is hell let me tell you it is right here in Hell, Michigan? You want real hell try working a slave job for a living.
Way I see it, Ecmandu this is your shot to save humanity, you said you want to send everyone to heaven well this is how you do it, with the DnA machine.