Justice League of America (1960-) #222

The Justice League conducts an interview with the refugee animal woman, Reena. Reena tells them how she was once the assistant and lover of Rex Rogan, CEO of Repli-Tech Industries. When the company went bankrupt, Rogan and the board members (as well as Reena) volunteered to gain newfound power by way of a scientific process that manipulated their DNA, transforming them into animals. Calling himself Maximus Rex, Rogan established a gladiatorial combat arena, in which he and the other Ani-Men participated in vicious combat sports for the benefit of wealthy patrons. Reena can no longer bear the guilt of having associated with such a monstrous process and now turns to the JLA for help.