Warning: the following contains SPOILERS for Dune.
Dune 2021 couldn’t be a 100% faithful interpretation of the book primarily because of the limitations of the film format, and one of the omitted scenes from the book involving Josh Brolin’s Gurney Halleck would’ve given the character much more depth. Despite the fact that Denis Villeneuve’s Dune eschewed many elements from the book in order to keep his Dune adaptation under two and a half hours, he did keep many of the right elements from the
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