Blue light legacy

After the death of All-Star Superman, the Eradicator activates and seeks out a worthy successor to uphold the ideals of the House of El. He finds Cal Genum, an orphaned high school senior who idolizes Superman. At the Superman memorial, the Eradicator offers Cal the chance to become a hero. Cal accepts and receives a serum that evolves his DNA, granting him numerous superhuman abilities, including super strength, flight, telekinesis, telepathy, super speed, and many more.

Cal undergoes intense training at the Fortress of Solitude, facing holographic simulations of Superman's villains. Once deemed ready, he debuts as Nighman, donning a black and silver Kryptonian flex suit with a six-sided star on his chest. His emergence catches the attention of both Lex Luthor and the Justice League.