Captain America: Civil War Almost Focused A Lot More On Bucky

According to Markus, the plotline that existed in older outlines with Bucky still had Daniel Brühl’s Zemo has a key player, so it doesn’t sound like his story was drastically different in the development of Captain America 3. That being said, there probably were some key alterations made, such as the significance of the brainwashed super soldier killing Tony Stark’s parents.

Article source: https://www.cinemablend.com/news/2471711/captain-america-civil-war-almost-focused-a-lot-more-on-bucky