I've recently been reading DC Comic's Dark Multiverse and I have been wondering just how the Dark Universe interacts with the Fourth World.
In Dark Knights Metal
Darkseid is still a baby, and Batman threatens to "use him." Later in the series, after Earth is pulled below the "Cosmic Membrane" we see an adult Darkseid fighting against the remaining heroes.
We know that version differs from the "real" version because
Grail has yet to help Darkseid kill Zeus to regain his power. Therefore, the original version is still an infant.
Additionally, in Tales of the Dark Multiverse: Blackest Night
Darkseid falls under the power of the Black Lanterns. He is killed (?) by the end when the entire universe is remade in the image of Lobo. Is this yet a third Darkseid, or merely an avatar the genuine article abandoned after this universe fell to the dark?
I know that the Fourth World is meant to exist outside the 52 universes, as evidenced by the map Kendra Sauders has in Dark Knights Metal. But does the Fourth World also have 'dark' counterpart? As Kendra put it, is there a Fourth World 'on the back of the map?'