After Batman teleported an alternate reality Justice League to help fight the Regime, Captain Boomerang was contacted by his former Suicide Squad teammate Harley Quinn, who asked if he would join her Joker Clan resistance against the Regime. Boomerang declined, preferring to continue working as a solo thief with all his competition imprisoned.
Rogues Gallery This character is or was a member of the Rogues, a loose collection of enemies to the Flash, in any of its various incarnations. They are a team of highly effective super-villains with their own internal code that prevents them from killing speedsters.
This template will categorize articles that include it into the "Rogues Gallery members category."
Flash Villain(s) This character, team, or organization, is or was primarily an enemy of any or all of the various incarnations of the Flash. This template will categorize articles that include it into the category "Flash Villains."
Suicide Squad member This character is or was a member of the Suicide Squad, a team of imprisoned super-villains who perform high-risk missions for the U.S. Government in exchange for commuted sentences, in any of its various incarnations. This template will categorize articles that include it into the "Suicide Squad members" category.
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