As of now, there are two main Aquaman films in the DC Extended Universe (DCEU). The first, titled "Aquaman," was released in December 2018. Directed by James Wan, this film stars Jason Momoa as Arthur Curry, also known as Aquaman. It explores his origins, his struggles to unite the underwater kingdoms of Atlantis, and his battle against the villain Orm, played by Patrick Wilson.
The second film, "Aquaman and the Lost Kingdom," is set to be released on December 20, 2023. It continues Arthur Curry's journey as he faces new challenges and adversaries, delving deeper into the lore of Atlantis and the world beneath the ocean. Jason Momoa reprises his role, and James Wan returns as the director.
While there are other appearances of Aquaman in various films and TV shows, these two feature-length films serve as the primary cinematic adaptations focused on this character within the DCEU. As always, it's important to stay updated, as plans for further films and projects can evolve rapidly in the film industry.