Music is such a large part of the Guardians of the Galaxy franchise, methods of playing tunes find themselves as central plot points. In the first film, Peter Quill's (Chris Pratt) primary source of music was the old Walkman player his mother left him. Fast forward to the closing moments of Guardians of the Galaxy Vol. 2, and the legendary Star-Lord is gifted a Zune, a popular MP3 player used for just a few years in the mid-2000s.