2017 G'Day USA Los Angeles Black Tie Gala - ArrivalsThe upcoming "Aquaman" standalone feature is shoring up its cast, and according to a new report, is now set to add yet another villain to the ensemble.

The scoop comes from The Hollywood Reporter, which writes that actor Yahya Abdul-Mateen II -- who recently made a splash on Netflix's flashy new series "The Get Down," and will next be seen in the big screen version of "Baywatch" -- is currently in negotiations to take the part of Black Manta in the movie, after impressing director James Wan and Warner Bros. studio heads. Black Manta is a supervillain who serves as one of Aquaman's major foes in the DC comics, and is known for his high-tech costumes and weaponry.

Adbul-Mateen isn't the only actor who's set to make things difficult for Aquaman (played by Jason Momoa) on-screen, with Patrick Wilson also joining the ensemble as the villain Orm, the half-brother of the titular hero who battles Aquaman for control of Atlantis. The rest of the cast includes Amber Heard as love interest Mera, and Willem Defoe as Dr. Vulko, a scientist and advisor to Aquaman.

"Aquaman" is set to swim into theaters on October 5, 2018.

[via: The Hollywood Reporter]