I am reading Event Leviathan, and there is mention of Task Force X, ARGUS, and the DEO, but does Checkmate exist too?
Technically, to my knowledge they’ve never been mentioned. But, DC’s made canon a lot of post-Crisis continuity again. So, maybe they existED, but I don’t think that they currently EXIST.
Well, I hope they bring it back in continuity. I would love to see characters like, Fire, Mademoiselle Marie, Count Vertigo, and Sasha Bordeaux again. Maybe they can have a confrontation with the Suicide Squad and Amanda Waller.
That sounds GREAT.
Who knows maybe, Brian Michael Bendis will have them in the Leviathan event.
If it does pop up in Event Leviathan, it will probably be in the same way that it popped up after Infinite Crisis.
Checkmate exist. Justice League vs. Suicide Squad’s villain was Maxwell Lord who describes in the Justice League Tie-in his past with checkmate.
All-Star Batman Vol. 3 First Ally is the story of Pennyworth pre-batman who I think worked for checkmate.