Marvel revealed the news on The Colbert Report, and host Stephen Colbert has long been a Captain America fan, even having the hero's iconic shield hanging on the wall of his show's set since the supposed murder of Captain America in 2008.
Now, Steve Rogers - Cap's alter-ego - is giving up the title of Captain America after he was drained of the super soldier-serum that gave him super strength and longevity, aging him 65 years. It only makes sense for his longtime partner to take over the role.
The move is part of a push by Marvel to increase diversity among its massive cadre of heroes, including the creation of a teenage superhero Ms. Marvel - who is a 16-year-old Muslim girl named Kamala Khan - and the creation of an African American Spider-Man with Miles Morales taking on the role of Spidey in the Ultimate Comics: Spider-Man series.
In Marvel's Captain America film franchise, Chris Evans stars as Cap, while Anthony Mackie recently starred as the Falcon in the Winter Solider installment of the movie series. It's unclear if this move by Marvel will have any effect on future film adaptations.