Captain America has worn many iconic suits over the years, whether it's variants of Stever Rogers, Sam Wilson, or Peggy Carter.

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.

Anthony Mackie headlines the upcoming Captain America: Brave New World. However, the lead star admitted refusing to wear one of the superhero's most iconic costume elements.