For those who have read the Dune books, what’s the realistic/optimal number of parts for this series of movies? It sounds like he’ll make 3 parts, but will that cover everything, or are there books that are so bad that no one cares whether they’re included?
Children of Dune, the third book, is the last that's actually adaptable for a movie. It would still be tough, probably at least another three movies to cover it and Messiah as well.
God Emperor is not possible. A prestige TV miniseries, yes, but not as a feature length film. It's also much more philosophical than any of the previous novels and light on action, so i'm not sure it would be received very well
Heretics and Chapterhouse are just too weird; I don't think it would fare well on any medium.