- Playing Against Type: Thomas Gibson as the villainous Deathstroke.
- Relationship Voice Actor: Talia and Nightwing are Inara and Simon.
- Role Reprise:
- David McCallum reprises his role from Batman: Gotham Knight as Alfred.
- In the French dub, in addition to the same role reprise that Justice League: War had regarding Adrien Antoine as Batman, several voice actors from previous adaptations reprise their roles here:
- From the DC Animated Universe: Jean Claude Sachot as Commissioner Gordon and Sybille Tureau as Talia al Ghulnote .
- From The Batman: In addition to Batman and Gordon, Thierry Murzeau as Killer Croc.
- From Batman: The Brave and the Bold: In addition to Batman and Killer Croc, Paolo Domingo as Robin/Damian Wayne and Jean Claude Donda as Ra's al Ghul.
- From Young Justice: In addition to Batman and Gordon, Donald Reignoux as Nightwing/Dick Grayson.
- From Beware the Batman: In addition to Batman, Gordon, Ra's, and Killer Croc, Pierre Dourlens as Alfred.
Trivia / Son of Batman