One important thing to remember about the upcoming Dune film.... It's only half the story. And apparently, the contracts haven't actually been signed yet by the production company for financing the second half.
They haven't explicitly said where the cut-off point is, but from things that have been mentioned I'm guessing the film cover's the general backstory, the Atriedes arrival on Arrakis, and ends with Paul reaching the Fremen for sanctuary.
That would mean Villeneuve's planned second half would be able to run with the whole Fremen training montage, the Harkonen's brutalisation of the populace, and the eventual Muad'dib rising and crusade and claiming of the throne.