Thousands of years ago, Steppenwolf and his army of Parademons attempt to conquer Earth through the combined energies of three Mother Boxes. They are foiled by a unified army that included the Olympian Gods, Amazons, Atlanteans, mankind, and the Green Lantern Corps. After repelling Steppenwolf's army, the Mother Boxes are separated and hidden in locations around the planet.
In the present, the world is in mourning over Superman, whose death
triggers the Mother Boxes to reactivate and Steppenwolf's return to
Earth in an effort to regain favor with his master, Darkseid
