Dwayne Johnson in a poster for DC's Black Adam.

The post-credits scene of Black Adam teases some intriguing possibilities for the future of the DC movie universe, as it is often the case with superhero movies. If you haven't seen the film yet, don't read this if you want to be surprised. Next, then...

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Superman is back in action. Black Adam, who has declared that no one on the planet is capable of going on, was told by Superman that they needed to have a talk. A recent story from the Hollywood Reporter shows how close the scene was to being approved, after Johnson was said to have fought hard for it to happen.

The scene for Adam was pitched to Lawrence by Jaume Collet-Serra, who wanted to shoot it in 10 minutes. Johnson's half of the scene was shot on the final day of reshoots, with the team using a body double and a version of John Williams' classic Superman theme. The emblem of Superman was shown on the chance that something wouldn't work out. The way it played out was very emotional. This is going to work for me. The guy with the head needs to be there.

The test screenings for Black Adam went crazy when they saw that scene. He had to film his part in London a month ago, where he was filming the third season of The Witcher. Since he couldn't go to the UK, he had to film remotely. He said that there are certain people that are iconoclastic as the characters that they play and he is one of them.

Black Adam is a movie.

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