Apparently just announced at San Diego Comic Con:
This is the poster for the psychedelic revenge thriller Sinatoro, for which comic book legend Grant Morrison will be writing the screenplay. […]
The film’s producers are Zdonk with video director Adam Egypt Mortimer on board. Grant Morrison describes the film as “a hallucinatory road-trip into the American psyche, and it evolved into a unique and genre-busting project, worthy, we hope, of a new way of thinking about movies.”
Looks like a late 90s Vertigo title. We’ll see if it actually happens… here’s hoping!