Dwayne Johnson addressed a potential plot hole in the upcoming Black Adam film.On Twitter, Fandango's Erik Davis posted a screenshot from the trailer for Black Adam that was shown at CinemaCon. Davis quoted a piece of dialogue in which Adam responds to a statement that "heroes don't kill people" with "well I do." He then said the trailer ends with Adam catching a rocket with his hands and having it explode around him. Davis called the trailer "dark, dangerous & badass," and quoted Johnson saying the film operates more in moral grey areas. One user responded by noting all the DC Extended Universe heroes who've killed people and noted the line doesn't actually make sense. However, Johnson replied, "Once you watch Black Adam, you'll understand the context of the line. It makes sense. The mythology of Teth/Black Adam. Ruthless with zero regard."RELATED: Guardians of the Galaxy 3 Reportedly Delayed Black Adam Release

In addiiton to the scene mentioned above, the CinemaCon footage of Black Adam also showed a look at the titular character as a slave before he got his powers. The footage also featured appearances from the Justice Society of America and a voice over from Doctor Fate (Pierce Brosnan), who is not shown on screen.

Black Adam has had an incredibly long production. Johnson was initially announced as playing the villain in 2014, though he'd been circling the part for much longer. He was originally slated to appear in Shazam!, but Warner Bros. eventually opted to give Black Adam his own solo film first.

RELATED: Moon Knight Director Criticizes Black Adam For Wasting a Representation OpportunityBlack Adam sees the titular character, also known as Teth-Adam, rejoining the world after having been imprisoned for 5,000 years. The film will see him intereacting with the Justice Society of America, and Intergang -- a major criminal organization in the DC Universe -- will also play a part in the film. It's unclear at this time just how Black Adam might interact with the rest of the DCEU and the role Johnson will play in that cinematic universe's future.

Directed by Jaume Collet-Serra from a script by Adam Sztykiel, Roy Haines and Sohrab Noshirvani, Black Adam hits theaters on Oct. 21.