In Captain America: Brave New World, Adamantium is discovered in the Celestial Island, and is a key part of the worldwide treaty that Harrison Ford's Thaddeus Ross is championing. In a speech at The White House he says that the metal has numerous health properties and could be the most important discovery since Vibranium.

Before 2023, it would have been unthinkable for a Marvel Studios film to flop at the box office. Regardless, The Marvels failed to, well, marvel audiences, earning a bleak $206.1 million worldwide, while Ant-Man and the Wasp: Quantumania disappointed the studio with only $476.

Captain America: Brave New World is nominally a political thriller in which the new Captain America (Anthony Mackie, taking over the role from a retired Chris Evans) must uncover a conspiracy to mind-control soldiers and embarrass the newly named President of the United States, Thaddeus Ross (Harrison Ford, filling in for the late William Hurt).