Flex Mentallo - Doomsday Clock (2017)

A metahuman and member of the Doom Patrol, Flex Mentallo accompanied his teammates and many other Earth-based heroes to Mars during their mission to track down the source of an unknown energy explosion that framed Firestorm for murder and turned the world against Superman.

He and Robot Man tried to take down Doctor Manhattan, only to be sent crashing back with ease. Before he could get back up, he was incapacitated along with the collective heroes in a single blast.