[Yokuutsu]

You mean other than the fact that Tolkien rejected every offer of a film adaption that came his way? He did, though he wasn't against a film adaption. And part of all that is if they followed the book exactly, it could extend the movies into the oh god why are they talking about this (which some people complained about anyway) instead of doing something area. And, personally, if they follows the book too closely, even fans would get bored because they could've just read the book for cheaper AKA free.

And hadn't Saruman kind of already started down that slippery slope of being on Sauron's side? -isn't sure- If so, why would he tell them anything he knows really?