2018's Aquaman starring Jason Momoa was a massive success, bringing in more than $1 billion at the box office. It's no surprise, then, that DC is looking for ways to expand the franchise, one part of which is a new animated TV show for the streaming service HBO Max.

The show, Aquaman: King of Atlantis, follows Arthur as he takes over as ruler of the undersea world. The three-episode mini-series is being produced by Aquaman director James Wan. However, it's unclear if the new TV show is connected to the movie.

"Aquaman takes the throne of the underseas kingdom for the first time and discovers that it’s not easy being in charge--especially with a half-brother trying to take Atlantis for himself, surface dwellers causing problems under the sea, and ancient evils threatening danger perpetually," reads a line from The Hollywood Reporter's description.

King of Atlantis will also feature the characters Vulko and Mera. Willem Dafoe played Vulko in the movie, with Amber Heard portraying Mera. It's unclear at this stage of Momoa, Dafoe, and Heard will be back to voice their characters in King of Atlantis.

The show is just the latest extension of the Aquaman series, as DC is also producing Aquaman 2 and a spooky spin-off focused on The Trench.