Returning characters: Superman, Batman, Wonder Woman, Flash, Aquaman, Green Lantern, Cyborg, Catwoman, Joker, Harley Quinn, Black Adam, Green Arrow, Black Canary, Supergirl, Black Manta and Starfire.
Returning IJ1 characters that weren't in IJ2: Lex Luthor, Deathstroke, Shazam, Hawkgirl and...