The first footage of Joaquin Phoenix ’s “ Joker ” premiered during the Warner Bros. panel at CinemaCon and quickly set the film world ablaze on social media. The October tentpole stars Phoenix as the iconic Batman villain, who has previously been played on the big screen by Jack Nicholson Jared Leto , and Heath Ledger . The latter won the Best Supporting Actor Oscar for his Joker performance in Christopher Nolan ’s “ The Dark Knight .” Now comes Phoenix’s turn as the character, who in “Joker” is portrayed as a failed stand up comedian who gets seduced into Gotham’s criminal underworld in the early 1980s.Appearing at CinemaCon, director Todd Phillips described the film as an “origin story about a beloved character with no definitive origin” and said the genre of the film is “tragedy.” Phillips was adamant that he is still shaping the film and said a lot of the reporting