This image released by Warner Bros. Pictures shows Joaquin Phoenix, left, and Lady Gaga in a scene from "Joker: Folie Deux." (Niko Tavernise/Warner Bros. Pictures via AP) Five years after “Joker” won the top prize at the Venice Film Festival, filmmaker Todd Phillips is returning with the sequel. “Joker: Folie à Deux” will play in competition with 20 other titles, festival organizers said Tuesday. The highly anticipated follow-up to the blockbuster comic book film stars Joaquin Phoenix as the mentally ill Arthur Fleck and Lady Gaga as Harley Quinn. Recommended Videos The lineup for the 81st edition of the festival,...