Joaquin Phoenix and Lady Gaga in "Joker: Folie à Deux."
Warner Bros.
- "Joker: Folie à Deux" opens in theaters Friday.
- Joaquin Phoenix returns to play Joker, and Lady Gaga stars as his love interest, Harley Quinn.
- The movie is being bashed by critics and has a 36% score on Rotten Tomatoes.
Five years after "Joker" became a sensation, grossing over $1 billion and earning Joaquin Phoenix an Oscar for his portrayal of the DC Comics villain, director Todd Phillips...