There’s still a lot about Bucky Barnes’ past as the Winter Soldier that the Marvel Cinematic Universe hasn’t revealed, and a fan theory suggests that among his many crimes was the murder of Peter Parker’s parents. The MCU now has over 20 movies with many more coming in the near future, and through them, it has told complete stories while others continue to develop, though many details about the backstories of some characters remain unknown. Such is the case of Bucky Barnes and Peter Parker, whose stories might be connected by tragedy.
Bucky Barnes (Sebastian Stan) made his MCU debut in Captain America: The First Avenger as he’s Steve Rogers’ (Chris Evans) best friend, but that same movie saw his apparent demise when he fell off a train. Captain America: The Winter Soldier revealed that Bucky survived but was captured by HYDRA, who experimented on him, brainwashed him, and turned him into a weapon, giving him the name of Winter Soldier. With the help of Steve and Wakanda’s technology, Bucky has left the Winter Soldier behind, but he’s still in the process of confronting that dark past. Meanwhile, Peter Parker (Tom Holland) finally made his MCU debut in Captain America: Civil War, where he was recruited by Tony Stark (Robert Downey Jr.).
Related: Bucky's Winter Soldier Backstory Can Set Up The MCU's First Mutant Villain
Peter returned in his first solo movie, Spider-Man: Homecoming, joined Bucky and the rest of the MCU heroes in Avengers: Infinity War and Avengers: Endgame, and got two more solo adventures in Spider-Man: Far From Home and Spider-Man: No Way Home. However, as Spider-Man was introduced as an already established hero and his backstory hasn’t been explored, there are many questions about it and different
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