Coming from Naughty Dog:
We’ve been hard at work since revealing Uncharted: The Lost Legacy at PSX building a story and an experience that joins a new protagonist, fan favorite Chloe Frazer, with all of the hallmarks of an Uncharted adventure. Today, we’re excited to share new footage and additional details about the game you’ve been eagerly waiting for—beginning with our release date. Uncharted: The Lost Legacy will launch on August 22, 2017 in North America for $39.99 USD, $49.99 CAD.
They also went on to say that anyone who pre-orders The Lost Legacy will receive Jak and Daxter: The Precursor Legacy on PS4 for free.