So is the first book worth the read? I didn't like the first film, didn't care for the miniseries, so I don't get the hype over this universe. But Hollywood seems to love it.
DUNE inspired a lot of properties in many ways, but I think much like say, John Carter or The Shadow what came after that they inspired has eclipsed them in the wider pop culture. I think there is a danger that this kind of "old" property that has not been kindly received by audiences in adapted form these last few decades will suffer a similar fate as Carter and Shadow.
But you can't discount that it is "known" and that people that are fans, even in the world of Hollywood film makers, are usually really passionate.
I agree with everyone that thinks a series ala GAME OF THRONES is probably a much better fit than trying to get three to four films out of it.
I've always had a soft spot for the Lynch film and the intentions for the SCI-FI miniseries are plain to see though I think it misses the mark by a bit. In both cases and as seen in the documentary about the aborted 70's film, I think an issue might just be that from top to bottom in these adaptations the creators are too enamored of the weird and strange inherent in the source and then dial it up to eleven. I think this is a mistake, and I am not even just talking about the plot or production design. Look at the performances in both Lynch's and SyFy's adaptation. The source material already has issues with relatable emotions and some what ham fisted dialogue. These adaptations didn't compensate for that. I get that a big appeal is the trippiness and out there philosophy, but for a mass market hit you need to make it easier to digest for the audience.
Look at the Lynch film and honestly it's biggest issue isn't the look or tone or the plot being to full or any number of valid criticisms. For me... it's the acting. Strange given the incredible cast, but that's my view. Lynch directed every actor it seems to go for some sort of bat guano crazy line reading OR to do things with an off putting emotional remove.
For this sort of story I think that choice, turn the "Weirdness/Strangeness" up to the max, is the wrong way to go. It's already an out there and unique setting and story. Let the actors be more grounded and allow for some emotional connection with the viewers. If they get this to be a series I will hope they take what I laid out into consideration.