Exactly, but at the same time this doesn't exactly bode incredibly well for Dune. Denis makes respectable hits out of movies with respectable budgets.
With this cast and story, the movie will almost certainly cost well over $100 million and given that WB is already creating TV spinoffs and a shared universe; their expectations are high.
And I would argue, perhaps too high to match what Denis or any other director short of a Cameron, Nolan, or Spielberg could realistically do.