The film was released on December 8, 2023, on Amazon Prime Video, receiving positive reviews, with praise for the animation, plot-line, and voice performances (including for Kibreab as Damian).

[3] Additionally, late Batman comic book artist Carmine Infantino appears in a cameo via archive audio.

Animation as part of an overall deal, Mike Roth (formerly a supervising producer and director on Regular Show) was approached by Warner Bros.

[9] By August 2022, HBO Max had officially relinquished distribution rights for the film, alongside other six projects including Batman: Caped Crusader.

[6] While the idea of featuring an older Damian who struggles between good and evil, as in the comics, was considered, the writers ultimately decided to portray him in a younger age because they felt the idea of a young Damian who wanted to be like his father "was such a fun starting point" that gave the filmmakers "the heart and comedy" they wanted for the film;[6] the writer nevertheless incorporated elements of his internal struggles in the final film.

[12] The writers also incorporated the "Bat-Dad" AI to serve as both a guide for Damian and to represent his desire to win his father's respect.

[2] The filmmakers wanted to "strategically [place]" tropes from Batman media in order to reflect Damian's growth, such as him trying and failing to use the Batmobile.

[2] For the film's version of the Joker, the writers drew inspiration from Bob Fosse's performance as Snake in The Little Prince, describing him as "[the] perfect foe to a little kid because he is basically like a big, peevish child himself — coaxing, cunning, and apt to rapid and irrational tantrums".

[6] Evans said the film's version of the Joker "feels that what was great about the past wasn't so much committing crimes but doing it with his villain friends", which he described as "a metaphor for how nobody should be alone on the holidays".

[5] That same month, Hornsby was confirmed to be voicing the Joker, while Dolph Adomian, Brian George, Therese McLaughlin, Chris Sullivan, Michael Fielding, Cynthia McWilliams, Natalie Palamides, and Reid Scott were revealed to be appearing in the film as Mr.

[6] In December 5, 2023, Roth revealed that the late Carmine Infantino, who was an artist on Batman comics during the 60s and 70s, would be appearing in the film as a cameo through archive audio.

[13] Patrick Stump composed the score for the film;[14] he previously performed the song "Who's the (Bat)man" for The Lego Batman Movie (2017).