The Arrow Comic-Con panel revealed that Batman villain, Anarky, and member of the JSA, Mr. Terrific, would be a part of the upcoming Season 4.
Now it's learned who the actors are that will be playing the characters.
Alexander Calvert will be playing Anarky, with Calvert known for The Returned and Bates Motel.
The part of Mr. Terrific will be played by Echo Kellum, known for A to Z, Rick and Morty and Sean Saves the World.
Season 4 for Arrow has already begun filming and premiers Wednesday, October 7th.
It was also recently learned another member of the Justice Society, Atom Smasher, will be joing Season 2 of The Flash.