Dr. Abraham Langstorm

Biography
Abraham Langstorm is the father of Kirk Langstorm who is the super villain known as Man-Bat and the most powerful business leader in Gotham City. Abraham was the head of Patriarch Biopharmaceuticals and a corporate rival of Thomas Wayne, father to Bruce Wayne who is known as the superhero and vigilante Batman. Abraham was ashamed of his son Kirk since he felt he was weakling and admired Bruce Wayne whom he felt shared many ideals as himself. At some point, Abraham sold his son's Man-Bat serum to Talia Al Ghul so she can create an army of Man-Bat creatures. Abraham eventually transformed into Man-Bat and caught the attention of Batman.