For a movie that was more about one man’s mental health condition than anything related to comic books, 2019’s Joker was shockingly successful, making over $1 billion worldwide and nabbing a Best Actor Oscar for Joaquin Phoenix. Phoenix and writer/director Todd Phillips are back with Joker: Folie à Deux (literally meaning "a madness of two"), a film that has some of the same themes but a story that could not feel more different.