Fan Casting Man-Bat in Batman: The Brave and the Bold

A scientist and geneticist who, while experimenting with bats to find a cure for his daughter's deafness, used himself as a guinea pig and transformed into the original Man-Bat, a giant, irrational bat creature, but was defeated and cured by Batman years ago. Langstrom is kidnapped by the League of Assassins who use his family as hostages so that he can recreate the Man-Bat serum to create an army.