I have heard this was a go, but Martin Scorsese and his team were just in my office scouting for locations. Office is a loose term, it's the old courthouse in Bartlesville.
Pretty cool to see him in town like that. I know they have filmed a few movies over the years here, but this looks to be the biggest if it pans out.
I read the book recently. The crimes perpetrated against the Osage remain outrageous.