Aquaman

Arthur spares Orm because he wants to unite the seven kingdoms through peace rather than domination. By offering his half-brother a chance at reconciliation, Arthur demonstrates the temperament of a true leader. This mercy is what separates Arthur's approach from Orm's violent conquest, proving he can bring the kingdoms together without genocide or fear.

Earlier in the film, Vulko counsels Arthur that strength alone cannot unite the kingdoms, he must show mercy.

The film reveals that Queen Atlanna did not die at the execution. She was rescued and hidden away in a hidden kingdom called the Fisherman Realm, where she lived in seclusion for years. Her survival is kept secret until she emerges during the final battle to stop the bloodshed between her sons.

Vulko's mysterious behavior and hints about Atlanna's fate foreshadow her survival.

The ending establishes that Atlantis must stay secret because its advanced technology and military power are too dangerous to be exposed to surface governments. Arthur serves as the bridge between both worlds, but revealing the kingdom could provoke war or make Atlantis a target for enemies.

Early scenes establish that surface nations would covet Atlantis' technology if exposed.

The Trident of Atlan grants Arthur the ability to command all sea creatures, including the monstrous Trench and the colossal leviathan Karathen. This legendary weapon is what allows him to lead a counterstrike against Orm's army and ultimately defeat his brother in single combat.

The trident is introduced as the only weapon capable of uniting the seven kingdoms.

The film acknowledges that Orm's grievances about humanity's pollution and destruction of the oceans are valid. However, his solution, waging war and committing genocide against surface dwellers, is fundamentally flawed. Arthur proves that unity and diplomacy, not violent conquest, are the proper response to these legitimate concerns.

Scenes showing ocean pollution and Arthur's own guilt about surface world damage set up this theme.

After being defeated in single combat by Arthur, Orm is forced to stand down when their mother Atlanna arrives. Rather than being executed or imprisoned, Orm is offered a chance at reconciliation by Arthur. He is spared and given the opportunity to redeem himself, though the film leaves his ultimate fate ambiguous.

Arthur's earlier refusal to kill Orm foreshadows this mercy in the final battle.

Yes, Arthur Curry ascends as the rightful king of Atlantis at the end. His claim to the throne is validated by the return of Queen Atlanna, his mother, and by his victory in single combat against Orm. He accepts the crown, ending the isolationist civil wars and beginning a new era as a ruler who bridges both the surface world and the depths.

Throughout the film, Arthur is positioned as the only one who can unite the kingdoms.

The mid-credits scene features Black Manta, who was stranded and near death at the bottom of the ocean, being rescued by a mysterious figure. This sets up Black Manta as a major antagonist for future films, hinting at the ongoing conflict and sequel potential.

Black Manta's survival after being defeated establishes him as a recurring threat.

The ending creates tension between Arthur's dual roles as king of Atlantis and member of the Justice League. As a monarch responsible for millions of lives, his duties to Atlantis could conflict with his superhero responsibilities. This sets up future struggles as Arthur must balance being both a superhero and a king.

Arthur's existing ties to the Justice League are established early in the film.