Warner Bros has released the second trailer for the upcoming film "Joker: Folie à Deux," featuring Joaquin Phoenix reprising his complex role as DC's infamous villain. Lady Gaga will play the role of Harley Quinn, the Joker's friend, in the film. Fans of DC have eagerly anticipated the release of the film and praised Lady Gaga's acting skills, with some even calling for her to win an Oscar for her performance. The upcoming film, directed by Todd Phillips, is set to be released on October 4.