The book is far too detailed for a single film. No way it could capture all that the book has. Two films is certainly a better approach, but if part 1 doesn't light it up at the box office, part 2 would be in serious jeopardy and we may never see it. Hoping that we do.
As per my usual Modus Op., I'll see it on 4K disc. Haven't stepped foot in a cinema since The Fifth Element.