Warning: Contains SPOILERS for The Batman.
The Batman set photos indicated Superman and Wonder Woman would be referenced in the movie, but it seems these DC «cameos» did not make the final cut. When Matt Reeves agreed to take on The Batman following Ben Affleck's exit, he wanted to reboot the Dark Knight as part of a new continuity. This allowed the director to cast Robert Pattinson as Batman and tell the early days of his vigilantism without worrying about what it means for the DC Extended Universe's canon. As a result, The Batman had the freedom to introduce new versions of major DC characters from the comics.
Robert Pattinson's new take on Bruce Wayne, a.k.a. Batman, is obviously at the forefront of this new universe. Audiences who see The Batman will meet Reeves' interpretations of classic Batman villains like Riddler (Paul Dano), Penguin (Colin Farrell), and Carmine Falcone (John Turturro). The movie also brings several of the Caped Crusader's allies to the screen, as Jim Gordon (Jeffrey Wright), Catwoman (Zoë Kravitz), and Alfred Pennyworth (Andy Serkis) appear. Of course, The Batman also includes teases of some other potentially significant DC characters for Batman's next adventure, such as Robin and Joker. All of these characters are squarely from Batman's corner of the comics, which means other Justice League heroes don't make appearances.
Related: Is The Mayor's Son Robert Pattinson's Future Robin?
However, set photos from The Batman teased fans with the exciting possibility of Superman and Wonder Woman making unexpected cameos. Based on the set photos, their appearances were set to come as part of Gotham's Halloween festivities. Background actors were shown wearing Halloween costumes that resembled Superman
Read more on screenrant.com