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.

Forget the Red Hulk – Captain America: Brave New World ‘s real “big debut” is adamantium. After all, adamantium’s introduction in the upcoming blockbuster is surely a signal that the MCU’s new Wolverine – and by extension, the franchise’s long-awaited X-Men reboot – is edging closer to the big screen.