From the announcement:
New from Paizo: Breathe life into lost cultures with character options that trace their origins back to ancient times, or pay homage to a distant ancestry with one of the archetypes presented in Pathfinder Player Companion: Blood of the Ancients!
Inside this book you'll find:
The vestige bloodline, which allows both bloodragers and sorcerers the power to not only glimpse into the past but also summon long-dead ancestors and forgotten cities and battlefields into the present day.
New archetypes, from the ancient Azlanti ioun kineticists and the Spawn slayers of Ninshabur to the golem-forged Jistkan artificers and the Heaven-mandated jinyiwei investigators of Lung Wa.
New spells recovered from ancient cultures, including mystic runes from Shory, life-preserving magic from the Mierani arcane wardens, and spells believed to have been used by the founder of Jistka himself.