Since his MCU debut in Captain America: The First Avenger, Sebastian Stan's Bucky Barnes has grown into a bona fide fan-favorite, particularly after his villainous turn in the really rather excellent Winter Soldier. And while Marvel comic book readers believe it's only a matter of time before Barnes assumes the Captain America title (perhaps in Avengers: Infinity War or Avengers 4?), we still have no confirmation on if that'll indeed happen.