The story starts with Darkseid’s fall to Earth after a war in heaven. What happened there?
The Fourth World was intended to be destroyed for the sake of the Fifth World. There was a war in heaven (one approximation of this was the events in Jim Starlin’s The Death of the New Gods mini-series) that ended up with Orion being the last god standing. Darkseid, however, could not abide by this, so he escaped by falling to Earth through time and space to the Seven Soldiers: Mister Miracle mini-series. Since that point, he had been planning to take over Earth. It was all part of his plan to avoid the Fifth World ever coming about, for as long as he was still around, it could not exist. So he figured if he could not rule the Fourth World, he’d rule Earth instead. Craig B.