I honestly thought this was an April Fool's prank when it was first announced, but this has to have the oddest pedigree I can think of. Fincher shooting a Tarantino screenplay spun off from his Once Upon A Time...In Hollywood with Pitt reprising his Oscar-winning role. Considering Tarantino's Film Or GTFO attitude, it's weird he's handed this off to a digital fetishist like Fincher, let alone making it for Netflix.
Fincher has an exclusive deal with Netflix so if he's involved that's where its going to go. Whats odd is that Sony lost the rights to the original so fast because Tarantino worked the deal so he would get rights back after a couple of years (literally). So an odd project indeed!