Tarantino wrote the script for the new film, which is set up at Netflix where Fincher has a first-look deal, according to The Hollywood Reporter.
It remains unclear whether DiCaprio will appear in the follow-up.
The project takes shape after Tarantino shelved plans for “The Movie Critic”, which was supposed to be his 10th and final film.
Pitt was expected to reprise his role as Cliff Booth in that project, set in the ‘70s, following a film critic who wrote for a porn magazine. In Tarantino’s novelisation of “Once Upon a Time in Hollywood”, Booth is revealed to be a movie buff, which would have tied into the story.
It is not rare for Tarantino to write a script for another director. He earlier penned the scripts for Tony Scott’s “True Romance” and Robert Rodriguez’s “From Dusk till Dawn”.