I liked the movie.  I read the entire series, so the plot was mostly coherent for me.  I left the theater thinking the reviews would be terrible, because anyone who hadn't read the books would be confused.  I was surprised that it was relatively well-received by the non-book-reading crowd.  

Why is this reflection relevant for the sequel, and potential sequels?  The story is only going to get more confusing from this point forward.  The first four books of the Dune series get gradually more and more strange.  I hope audiences aren't expecting things to suddenly become more clear as the story progresses.  If anything, it becomes more abstract, more psychological, and more philosophical.  There are long sections of the second book that are essentially metaphysical monologues.  

I am personally excited to see this director's take on the rest of this story, but I won't be surprised if audiences hate it.