I’m a bit skeptical about this. I understand why Warner is doing it, but I think they should use a lesser known character. They are bleeding the Batman Universe dry. DC/Warner is beating a dead horse.
Personally, I wouldn’t mind seeing DiCaprio playing the Joker.
By bringing on Martin Scorsese as a producer, the studio hopes to use the legendary filmmaker to lure his longtime collaborator into the world of comic book franchises.
Source: Leonardo DiCaprio in Joker Movie? Warner Bros. Wants Class, Cachet | Hollywood Reporter