An alternative costume for Green Arrow is based off Stephen Amell, who plays the character in the TV series Arrow (2012). While Alan Tudyk, who voiced Green Arrow in La Ligue des justiciers: Nouvelle Génération (2010), is normally used as this character's voice, Amell replaces him when the costume is used.
Kevin Conroy, Susan Eisenberg, George Newbern, Carl Lumbly, and Phil LaMarr have all voiced their respective characters in the DC animated Justice League series.
The Flashpoint Batman costume is actually Thomas Wayne, Bruce's father, in an alternate universe where Bruce was murdered instead of his parents.
Despite their main costumes having similar designs to DC Comics' "New 52" line, all costumes were remade by Netherrealm Studios. However, the New 52 costumes are available as alternate costumes for several of the playable superhero characters.
One of Batman's alternate costumes in the game is the Batsuit worn by his successor Terry McGinnis from the TV series Batman, la relève (1999).