Now, with Bucky having been cured of his brainwashing and well on the path back to heroism care of Shuri (Letitia Wright) in Black Panther’s post-credits scene, it feels like the next phase of his story is imminent — and it absolutely wouldn’t be a surprise to see him pick up the mantle in Steve’s wake.
The second most probable replacement is Sam Wilson, the current Falcon. Introduced in The Winter Soldier, Sam has spent the past two Captain America films as Steve’s modern day right-hand-man and best friend. This tracks with his comic history as well, where Sam spent decades as Steve’s superheroic counterpart. For a time, the regular Captain America title was even known as Captain America and The Falcon as they worked as a duo exclusively.