He appears on the Monitors' satellite headquarters and threatens Solomon to help him find Earth Prime. Solomon tells him that if he releases Forerunner, he will show Prime what he wants; Prime does so. Solomon then tells Prime that Earth-51 is his perfect Earth, and it is in ruins due to the fighting between Monarch's Army, the Earth-51 heroes, and the Challengers. Prime leaves the satellite, intending to confront Monarch. Superman-Prime fights with Monarch, finding out that this is an enemy who is on his level despite his boosted powers from the Guardian. The two seem evenly matched until Prime becomes slightly injured after Monarch exposes part of his suit and releases some of his massive contained energies. In a fit of rage, Superman-Prime redoubles his attack on Monarch and rips open the chestplate of Monarch's containment armor, resulting in a huge explosion of quantum energy that seems to destroy the entire universe of Earth-51.