Beyond there being stat blocks for all the NPCs and villains of note, there'll be some new things here and there (mostly in the form of new items or spells or monsters unique to the area), but it's not intended to be a player's book. It's VERY focused toward the GM who wants to run a Sandpoint campaign (it will have elements of "build your own campaign using this book as a sandbox workshop") and to folks who just want to know more about Sandpoint.
Re: "sandbox workshop"
Question - will there be distinct themed-organizational header text for each section and subsection so that a GM who goes back to review certain pages to will be able to easily borrow the "skeleton of organization" of Sandpoint to better organize his/her own campaign bible?
I am rearranging/editing my Darkmoon Vale/Falcon's Hollow campaign bible, and I'd like to be able to upgrade my information organization with the latest "best practices" from Paizo in Sandpoint, as DMV and related products are 5-10 years old now.