Those worlds share a fragile peace with one another, and Darkseid’s efforts to conquer the universe and eliminate all free will using the Anti-Life Equation often results in the heroes of New Genesis stepping forward to foil him and his minions.
While we’re a long ways away from learning any specific plot information for New Gods, just like in the comics, it’s expected to follow the twin planets New Genesis and Apokolips, the former ruled by Highfather and the latter ruled by Darkseid.