No Weapon X yet, but Captain America: Brave New World marks the arrival of adamantium to Earth-616 in a departure from its comic book origins.

Curious about Celestial Island and the Adamantium treaty in Captain America: Brave New World? This pivotal storyline introduces a mysterious new location that sparks intense global interest. It showcases nations competing for control over a rare and powerful resource,

Brave New World brings adamantium into the fold. The substance shows up in the body of the Celestial that emerged from the Indian Ocean in Eternals. Now, it's the cause of international conflict, as major world powers try to control the world's only known adamantium supply.