Listen to Cap's Promise (From "Captain America: Civil War") online. Cap's Promise (From "Captain America: Civil War") is an English language song and is sung by Movie Sounds Unlimited. Cap's Promise (From "Captain America: Civil War"), from the album Kids Halloween Fandom 2016 (Costume Theme Songs), was released in the year 2016. The duration of the song is 3:40. Download English songs online from JioSaavn.