Deadline says
Michael Eisner’s The Tornante Company will finance and produce the development of a feature film based on Garbage Pail Kids, the trading card line published by Topps. Eisner bought the card company in 2007 and this is his first feature spinoff project. Toby Ascher is producing. PES (that is what he goes by) will direct the film, which will be scripted by Michael Vukadinovich, who most recently set his Black List script The Three Misfortunes Of Geppetto at Fox and Shawn Levy’s 21 Laps. PES, an award winning creator of shorts, developed the story with Vukadinovich. His latest film is Fresh Guacamole, and his other shorts include Roof Sex and Western Spaghetti. All of them have been wildly popular viral videos.
TNS: "The Substance is a body horror film that risks turning away an audience for some of the best bloodiest scenes in recent memory."
In case this needs to be stated explicitly, this contains huge spoilers for Joker: Folie à Deux and the film's ending.
Oh no, Joker: Folie à Deux! Look at how they massacred my boy.