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.

That's because Captain America: 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.

Brave New World still opened with a haul at the box office last weekend, and the film is set to pass another major milestone today. Brave New World, which features the big-screen debut of Anthony Mackie as Captain America,