Your half-brother, King Orm, is about to declare war upon the surface world. Billions will...

Mera: Your half-brother, King Orm, is about to declare war upon the surface world. Billions will die, your people and mine. We must stop him. Arthur Curry: And how do you propose we do that? Mera: You are the firstborn son of Queen Atlanna. The throne is yours by birthright. The only way to stop this war and save both worlds is for you to take your rightful place as King. Arthur Curry: [laughs] You think if I just show up, Orm will give up the throne? I'm the bastard son of a queen your people executed. Trust me, I'm no king. Mera: I agree. Arthur Curry: That's awesome. Mera: But, Vulko seems to believe in you for some reason, and that's why I'm here. Vulko has learned of the location of the lost Trident of Atlantis. Arthur Curry: Fairy tales. It's a myth. Mera: It's not a myth. With the sacred Trident, people will listen to you. You can then claim your birthright and dethrone Orm. Arthur Curry: My birthright? It died with my mother. But I'll promise you this: if Orm attacks, I'll treat him the same way your people treated her, with no mercy.