During the virtual DC FanDome event in August, Johnson revealed that the film's version of the JSA would include Hawkman, Doctor Fate, and Cyclone, in addition to Atom Smasher. Fate (Kent Nelson) and others with the Justice Society of America must do everything they can to stop him from unleashing his powers on the world.

That November, Hiram elaborated that they had an outline for future films and spin-offs featuring Black Adam and the JSA, dependent on the first film being a success; [169] he later added that other characters beyond Shazam and Superman were being considered as potential future rivals for Black Adam such as Wonder Woman. Exclusive: 'Black Adam' Will Use New Technology to Showcase Dwayne Johnson's Superhero Powers, Teases Producer Hiram Garcia". By November 2007, Johnson was also interested in the film's antagonist, Black Adam, and had received positive responses from fans about him possibly playing that character. The villain doesn’t do much of anything except provide us with a pretty cool battle, so we will take it — reluctantly.Black Reel Awards Nominations Announced For 23rd Annual Ceremony; The Woman King And Black Panther: Wakanda Forever Lead With 14 Nominations". The Justice Society of America nearly steal the movie right from underneath [Johnson] as the film gives them a satisfactory introduction, leaving us wanting more from all of them by the end.

Noah Centineo and Quintessa Swindell’s Atom Smasher and Cyclone feel like they stumbled in from another movie.Dany Garcia stated in May 2021 that Johnson and the other producers planned to make multiple Black Adam films during their "long-term relationship with DC", [167] and Hiram Garcia reiterated in July that there was potential for Cavill and Johnson to appear in a future project together as Superman and Black Adam. Johnson remarked that "the Black in Black Adam refers to his soul", and described his worldview as "myopic", adding that for Adam, "There's no room or space for him being wrong. Collet-Serra joined in June 2019 with a planned release date of December 2021, but this timeline was delayed by the COVID-19 pandemic. Johnson said on June 20, 2021, that there were three weeks left of filming, [71] and on July 15 he announced that he had completed his scenes. Viola Davis and Henry Cavill appear uncredited, reprising their respective DCEU roles as Amanda Waller [33] and Kal-El / Clark Kent / Superman.

That August, Johnson said he was still attached to the film but had not yet decided if he would play Captain Marvel or Black Adam.Maybe they thought that for the amount of time this movie had been gestating it just had to be something special. Black Adam': Dwayne Johnson Shows Up In Costume, Rumbling Hall H With Exclusive Footage Featuring Viola Davis' Amanda Waller – Comic-Con".