Bio: In Grant Morrison's Batman #664, Batman discovered that a pimp had been supplying an ex-policeman who lived on an abandoned facility with prostitutes. The women eventually turned up dead. Batman tracked him down and was severely beaten by the man, who was dressed in a mixture of Batman's and Bane's costumes. Batman suspected the imposter had used Hugo Strange's Monster Serum and daily venom shots to gain his size and strength.
It has been established, in Batman #674 that this monster really was force fed the growth-enhancing serum of Hugo Strange and the strength-enhancing super-steroid Venom. This made him strong enough to lift a Batmobile over his head during his battle with Batman and Robin. It is also revealed that he was a family man by the name of Branca, who eventually killed his own family while driven by rage from the drugs that Doctor Hurt had put into him.