Sebastian Stan, who plays Bucky Barnes in the MCU, has some ideas about prequels involving his character.
Stan appeared at Comic-Con Liverpool in the UK, where he was asked which MCU films he would potentially wish to make prequels for. "We could probably do with a prequel before Captain America: The First Avenger, so we could really learn maybe more about their friendship," he commented (via Comic Basics), referring to the friendship between Bucky and Steve Rogers. "Their relationship, you know."
