The Aquaman 3 (2025) final teaser trailer plunges us back into the depths of Atlantis, with Arthur Curry (Jason Momoa) facing his greatest challenge yet. The trailer opens with a powerful shot of a crumbling Atlantis, ravaged by unseen forces. Arthur stands among the ruins, looking conflicted as a haunting voiceover from Queen Atlanna (Nicole Kidman) echoes: “The ocean has secrets, Arthur… ancient forces, older than Atlantis itself.”

The camera then cuts to an imposing new villain, Necron, the ruler of the Black Sea (played by Keanu Reeves). Necron seeks the Trident of Eternity, an artifact of unimaginable power that could give him control over not just the ocean, but all of the realms of Earth. His arrival brings chaos as tsunamis devastate coastal cities and whirlpools tear through the seas. The visual scale is stunning, with vast ocean storms and apocalyptic underwater landscapes.

Arthur, now fully embracing his role as king, gathers allies both old and new. Mera (Amber Heard) returns, along with Orm (Patrick Wilson), now reluctantly siding with Arthur after their past conflicts. The teaser also introduces a powerful new ally, the warrior queen of the Arctic seas, played by Gal Gadot, who aids Arthur in the battle against Necron’s army of sea demons.

The trailer features epic underwater battles, with Arthur wielding the Trident of Atlantis in a showdown against Necron, whose powers seem unbeatable. The stakes are made clear: if Necron gains the Trident of Eternity, he will become the most powerful being in the ocean, capable of destroying both Atlantis and the surface world.

The trailer ends with a breathtaking confrontation between Aquaman and Necron in the depths of the ocean, their powers clashing in a storm of energy. Necron, with glowing red eyes, declares: “The seas will bow before me.” The final shot shows Arthur rising from the ocean, battered but determined, delivering the line: “Not while I’m king.”