Check the official thread. You have designers popping up and giving a bit more info. http://paizo.com/products/btpy97vo/...ying-Game-Pathfinder-Unchained-Hardcover#tabs
Do we know for sure if this book is meant to be used in conjunction with the old pathfinder corebook, like an upgrade or errata, or is it going to be a book that is contains the entire game system, not just the elements that have been changed from the last pathfinder corebook?
I kinda agree with the thoughts that it might just be a trial balloon to test fan opinion of doing a overhaul of the entire line at some point, I could see how Paizo would be worried about stagnation in their system.
Would it be fair to say that it sounds like an Unearthed Arcana?It's a big book of optional rules meant to be used in conjunction with the Core Rulebook. It is in no way a replacement for that book.
Do we know for sure if this book is meant to be used in conjunction with the old pathfinder corebook, like an upgrade or errata, or is it going to be a book that is contains the entire game system, not just the elements that have been changed from the last pathfinder corebook?
Would it be fair to say that it sounds like an Unearthed Arcana?