Oh, it'll start put well, but before the quarter is out there will be the Money Men insisting on more of that suff they had in Avatar and there will go the shooting match.
Jodorowsky's version would also have been a confusing mish-mash of religeous piety and deus ex machina if the recent documentary is any indication. He went on record explicitly saying he was not going to be filming the book, but his own story inspired etc etc blither drool.
I dunno why the film-makers always emphasize the religeon either. They entirely omit to mention in any of the exsisting versions that the whole Fremen Prophecy was a scam planted possibly centuries before by the Bene Gesserit as a lifejacket for stranded sisters.
And if Herbert junior is involved the seal of doom is already attached. He managed to take an awesome series of books and naff them up good and proper, destroying the sense of the weight of centuries in the elements of the saga and filling the gaps left with eighties/nineties speech rhythm and mannerisms, and brought to bear a vision that stretched only about three generations.