In Joker War event tie-in Croc has enough after Joker and his goons made their way to Monstertown and tore it to pieces. He decided to create a new one in the sewers of Gotham, hoping that he and the others would be left alone. He also explained how his mutated friends came to be. Croc wants to bring others down to the sewers for protection from the war above. Batman attempts to warn Croc of the dangers of the chemicals in the water, but, unfortunately, Croc doesn’t believe him. He orders his team to kill Batman. After making a deal with batman, they fight and loses. Croc and his gang settled in their cells. He promises them the best of care, including a reversal of their conditions, if a cure can be found.