“Folie à Deux” does neither. Taking a cue from the last scene of “Joker” — a psych evaluation where Arthur hears Frank Sinatra’s “That’s Life” in his head and starts to sing along — the film is basically one long drawn-out courtroom drama, interrupted by musical numbers (old standards, most of them sung in Arthur’s head).

"It's a huge disaster, but what is the fallout?" asks one source after the sequel to the $1 billion hit bombs at the box office and is rejected by critics and audiences alike.