Fan Casting Anti-Monitor in DC Characters

The Anti-Monitor is perhaps the greatest threat creation has ever known. Born some 13 billion years ago in the Antimatter Universe, the powerful entity conquered his universe and sought to destroy all the positive matter universes and expand his own dark realm. He unleashed an antimatter wave on the Multiverse, murdering trillions and erasing universes from existence with his army of shadow demons. He was opposed by his benevolent twin, the Monitor, who gathered heroes from all worlds to stop him in the event known as the Crisis on Infinite Earths.