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In the early stages of the Marvel Cinematic Universe, actors weren’t always as sure that they’d reprise their roles as Gemma “Marvel owns us for life” Chan. Sebastian Stan told Vanity Fair that when he played Bucky Barnes in the 2011 film Captain America: The First Avenger, he thought it was a one-time appearance. The actor has now portrayed the character for a decade and counting. According to Stan, he was “told about [the role] and where it could go, but it didn’t seem like there was any commitment, really.” He said he was informed that he would be given a green sleeve after Bucky fell off a train and lost an arm, initiating the storyline for the Winter Soldier….