In this concluding chapter of the "Metal Men" arc, Superman and Batman confront a formidable threat as Brainiac merges with the O.M.A.C. (Omni-Mind and Community) virus, creating a powerful adversary. With the Metal Men—Copper, Iron, Lead, Mercury, Platinum, and Tin—under Brainiac's control, the heroes must devise a strategy to counteract this fusion of technology and malevolence. As the battle intensifies, the duo uncovers a hidden asset in Bruce Wayne's arsenal that could tip the scales in their favor.