(DC Comics Presents #35) -Kirk and Francine found that their daughter Rebecca had inherited their superhuman hearing, and theorized that the Man-Bat serum had altered their chromosomes. Doctors told the Langstroms that Rebecca couldn’t sleep because of her hearing, and it would inevitably lead to her death. Kirk became Man-Bat and broke into S.T.A.R. Labs in desperation, hoping they had technology that would cure her. Superman caught him in the act, and after he gained the heroe’s confidence by revealing his secret identity, Superman told him he’d acquired an alien device, an ultra-sonic wave device capable of rearranging the molecular structure of organic material, and claimed it could help. They traveled to the Fortress of Solitude, but the Atomic Skull had been trailing Superman, and broke into the Fortress and stole the device. The heroes pursed Atomic Skull onto his SKULL craft, where Superman used his heat-vision to short out the controls of Skull’s neural pacemaker. Skull’s last energy blast damaged the saucer’s control panels, and he fell from the saucer to his apparent death. Superman recovered the wave device and used it to change his powers back to normal, and to cure Rebecca.

(Firestorm II #21) - The Society orchestrated a countrywide prison breakout of metahumans, and afterwards Man-Bat, Hush and Killer Croc rampaged through Gotham.

(Batman: Battle for the Cowl: Man-Bat #1) - Kirk Langstrom had a nightmare about transforming into Man-Bat and killing Francine. Oracle sent out distress signal Code Black to call on all the people that ever owed Batman a favor to deal with the chaos in Gotham in the wake of his apparent death. Francine Langstrom received the call, and when Kirk woke she was gone, and he was upset that he was deemed too unstable and too much of an outcast to be called on for help. He took the Man-Bat serum and went in search of his wife, coming upon the Outsiders dealing with Joker's clown gang. They tried to restrain him, and he flipped out, hitting them with a sonic scream and flying off. He tracked Francine to a power station, but was burned and knocked out by Dr. Phosphorus, who'd abducted his wife and learned about Man-Bat from her. Kirk awoke as a human, and Phosphorus told them how alike they were, both monsters and men of science. He just wanted to talk to Kirk, but Kirk fought and escaped with Francine, although Phosphorus destroyed his serum. Phosphorus followed and was ready to burn Francine to bring out the beast in Kirk. It worked, he transformed without the serum, and they struggled, falling into Gotham's harbor, with only Man-Bat emerging. The Outsiders confronted him again, and Francine convinced him to become Kirk again. He was horrified that he'd lost control over his dark side and ran away screaming.