Fan Casting Doomsday in Return to the DC Universe

Centuries ago on a savage Krypton, a scientist named Bertron attempted to create the Ultimate, a lifeform who was unkillable. Over the years, it would grow, learning of the torment it kept enduring before killing Bertron and all in his lab, escaping the planet eventually. Known for destruction, Doomsday as he would be called on Earth laid a swath of death, even as he would return from death itself. Having been involved in the death of Superman, Doomsday is one of the most dangerous beings in the entire universe.