Would this be a single movie or a 2-3?
Wikipedia references the story broken up in three parts:
I'd be surprised if he did it all in one movie. A trilogy sounds nice and would make a neat collector's set once the last one comes out like the LOTR DVD sets.
If anyone else was curious about the new IMAX cameras as I was this article outlines it well:
IMAX Next-Gen 65mm Film Cameras: All Details - Y.M.Cinema Magazine
Notably they'll be quieter (they sort of
sound like a helicopter) and that means more directors may be willing to use them more often.