The Winter Soldier doesn't become Captain America in the regular comic storylines. It's Steve Rogers who holds that position. But comics are full of surprises and alternate universes, so there could be special instances where this happens in some less common or alternate versions.
No, the Winter Soldier doesn't become Captain America in the comics. Captain America is a distinct role held by Steve Rogers for the most part.
No, Hawkeye doesn't become Captain America in the comics. Their roles and identities are distinct.
Yes, Sam does become Captain America in some comic storylines.
No, the Falcon doesn't become Captain America in the comics. At least not in the traditional sense.
Falcon doesn't become Captain America in the comic universe. The mantle of Captain America has its own established history and succession that doesn't include Falcon.
Yes, Falcon does become Captain America in some comic storylines.
Yes, Falcon does become Captain America in some comic storylines.
No, Bucky doesn't become Captain America in the comics. Steve Rogers remains the main Captain America.
In the comics, Falcon doesn't take on the role of Captain America. The Captain America identity has had various successors, but Falcon isn't one of them. This is part of the complex and evolving storylines in the comic universe.
The story of 'Captain America: Winter Soldier' is complex. It mainly revolves around Steve Rogers adjusting to the modern world. Hydra has secretly infiltrated S.H.I.E.L.D. The Winter Soldier, Bucky Barnes, who was Steve's old friend, has been brainwashed by Hydra to be a deadly assassin. Steve discovers the truth about S.H.I.E.L.D. and Hydra's plot. He teams up with Natasha Romanoff to fight against this conspiracy and also tries to save his friend Bucky from the control of Hydra.