Justice League of America [JLA; Black Canary [Dinah Lance] (flashback); Green Lantern [Hal Jordan] (flashback); Hawkgirl [Kendra Saunders] (flashback); Red Tornado (flashback); Superman [Clark Kent; Kal-El] (flashback); Wonder Woman [Diana Prince] (flashback); Vixen [Mari McCabe] (flashback)];
Teen Titans [Changeling [Gar Logan]; Cyborg [Victor Stone]; Kid Flash [Wally West]; Raven [Rachel Roth]; Robin [Dick Grayson]; Starfire [Koriand'r; Kory Anders]; Terra [Tara Markov]; Wonder Girl [Donna Troy]];
Baron Bedlam [Frederick DeLamb] (villain); Baron Blood (villain); The Brain (villain); Dr. Sivana [Thaddeus Sivana] (villain); Fearsome Five [Gizmo [Mikron O'Jeneus] (villain); Jinx (villain); Mammoth [Baran Flinders] (villain); Psimon [Simon Jones] (villain); Shimmer [Selinda] (villain)]; Felix Faust (villain); Force of July [Lady Liberty (villain); Major Victory (villain); Mayflower (villain); Silent Majority (villain); Sparkler (villain)]; Gorilla Grodd (villain); Masters of Disaster [Coldsnap (villain); Heatstroke [Joanne] (villain); New-Wave [Rebecca Jones] (villain); Shakedown (villain); Windfall [Wendy Jones] (villain)]; Roderick (villain);
Herald [Mal Duncan]; Alfred Pennyworth (flashback); Amanda Waller; Denise Howard (flashback)