Darkseid's loomed behind the run so far - his death started it and his passing's the reason its new threat, the Nyctari, are active now.

There's a child of prophecy tied to those god-purgers, one Metron's interested in.

He's made a pawn of Maxwell Lord - brought him out of his post-Rebirth-Wonder-Woman coma and turned his resources to acquiring the child.

In issue #7, some of New Genesis'd arrived on Earth fleeing the Nyctari.

Those of Apokolips who'd fled the enemy's coming there first had also made it to Earth. Max'd met them - and Metron'd smoothed enough the way to their combining forces.

( Their goal was the prophecy child, whom they understood to be Darkseid again. )