Stories from the set

Ben Affleck stated that he was happy to appear on screen in this film as Bruce Wayne (Batman), which sharply contrasted with his opinion of filming the sci-fi action film Justice League (Zack Snyder, 2017), where he played the same character.

Michael Shannon was not sure about the advisability of returning to the role of General Zod, mindful of the circumstances of his departure from Zack Snyder's franchise, but Snyder himself had no objection whatsoever to Shannon playing the role again, which he told the actor.

The intention to make this film first became known in 2014, and it was released in 2023. In the meantime, nine seasons of the eponymous television series aired (2014-2023).

The shooting period, or production, began four years before the film's theatrical release. This is explained by a number of reasons: in particular, the impact of the coronavirus pandemic on the film industry, Warner Bros.' doubts about the future of the "DC Extended Universe" after a string of unsuccessful releases (which either were not received by the public as expected or did not gross what was expected), and major projects from other studios awaiting wide release and, accordingly, the absence of a convenient "window" for a premiere. Problems in the personal life and the improper conduct of lead actor Ezra Miller (he was arrested repeatedly and faced accusations) also played a role.

Henry Cavill was originally set to make a cameo appearance as Superman, but his scenes were cut when the DC Universe reboot was announced, ending Cavill's plans to return to the franchise.

Ezra Miller and British writer and comic book author Grant Morrison wrote a script that portrayed the main character in a darker light, but the studio did not take to this version of the script.

Mexican and Brazilian actresses such as Bruna Marquezine and Izis Valverde were also considered for the role of Kara, but they were unable to travel to London for filming due to coronavirus restrictions.