Knives Out sequel is titled "Glass Onion: A Knives Out Mystery."
The title was inspired by the 1968 Beatles song.
Song's lyrics are intentionally confusing and meaningless.
"Glass" in the title represents mystery hidden in plain sight.
The song was chosen after Johnson searched the music library for songs with "glass" in the title.
"Glass Onion" is also the name of a bar in the film.
The giant glass onion structure on Miles's compound can also be seen in the film.
"Glass onion" contradiction is simple, and It is multi-layered but transparent.
The murder mystery in the film is also a "glass onion" paradox.