Joaquin Phoenix returns as Arthur Fleck in the sequel to Joker titled Joker: Folie à Deux. The Joker is still seriously mentally ill, of course, but this time he's in love! Fleck is plenty menacing in the trailer, but his presence is overshadowed by Lady Gaga as Harley Quinn. The scenes of the courtship of these two damaged people move from reality to fantasy and back again, a perfect palette for the movie's 15 musical numbers, which The Daily Beast likens to "La La Land meets Batman." Yes, Joker: Folie à Deux is a musical. It's no comedy, so don't expect anything like the Margot Robbie movies. We don't yet know if the relationship between Fleck and Quinn is as co-dependent and abusive as it is in other stories, but the Joaquin Phoenix movies are not connected to any other DC movies, so my guess is that we will see many differences from the comic book version. They sure seem completely smitten with each other. Joker: Folie à Deux will be in theaters October 4, just in time to sell Halloween costumes from this movie. -via Geeks Are Sexy