Captain Boomerang appears in a small cameo in the Injustice: Gods Among Us Comic. He is also one of the Flash's enemies.
George "Digger" Harkness, aka Captain Boomerang was a recurring enemy of the Flash. He devised altered boomerangs which could produce astonishing effects and used them ruthlessly. He became a staple member of the Rogues Gallery, a group of villains dedicated to opposing Flash.
Captain Boomerang is one of several of the Flash's Rogues who are searched for by the Justice League in hopes of finding Mirror Master. Boomerang battles Cyborg who easily destroys several of his trademark weapons while demanding the location of Mirror Master from him.
Injustice 2 Comic
Captain Boomerang was seen as one of the members of the Suicide Squad.
Powers and Abilities
Harkness has mastered the use of the boomerang, and uses several different types of trick boomerangs, ranging from a collapsible type to explosive. Digger also has some skill in hand-to-hand combat.
In keeping with the style of Injustice, Captain Boomerang wears a more modern and military styled version of his classic costume.