I do know that these will be primarily film based, and that makes sense. But I loved the movies best when they managed to bring to life the book in a way that I had always imagined. There were other parts that changed or contradicted what was written by Tolkien--and while I often understood why PJ did what he did, the changes were just what I had to put up with in exchange for so much that was done right from the book.
While there was a struggle between Frodo and Gollum in the book, PJ kind of expanded on and altered the chain of events. In the book, Frodo puts on the ring and Gollum bites it off his finger, dances for joy, and falls over the edge. There is not a protracted fight between the two of them, nor is there a scene with Frodo hanging over the edge with Sam trying to "talk him of the ledge," so to speak. So it doesn't play out exactly how I have carried it in my imagination after reading and rereading the book over the years.
When it comes to the dioramas, I think I will be most excited about the big iconic moments from the films that also bring to life the events of the book with the greatest possible accuracy. Sam carrying Frodo up the slopes of Mount Doom qualifies. Gandalf facing off against the Balrog does as well. There will (hopefully) be a lot of dioramas that will present a moment from the films that also happen to remain faithful to the book as an added bonus for us book lovers.
(At least the first one isn't Aragorn falling off the cliff during the Warg attack.)
Of course, I will be thrilled if it's this scene--straight out of both the book AND film:
