Dune is such a movie and yet Villeneuve basically had to beg and wait for the studio to greenlight Part II. This should have been shot back to back as it's simply an unfinished film in its current form.
This is a franchise where individual movies cost $150m+ to make. I can see why a studio wouldn't be willing to greenlight all of it at one go, especially given how the previous adaptation attempt at the same franchise was not received well.
