In Todd Phillips’ opinion, his film, a dark, violent, controversial, R-rated character study that chronicles the origins of Batman’s greatest villain, is something that the Disney-owned Marvel Studios simply can’t do. Marvel became the behemoth it is by making PG-13-rated, four-quadrant films for everyone. It’s blockbuster entertainment that is all part of a shared cinematic universe. Pretty much everything that Joker is not.
Article source: https://www.cinemablend.com/news/2480171/todd-phillips-says-dcs-joker-is-a-movie-marvel-couldnt-make