From the announcement:
Fantasy Flight Games is proud to announce the upcoming release of Stay on Target, the first career supplement for the Star Wars®: Age of Rebellion™ Roleplaying Game!
Stay on Target focuses on the Ace career, expanding it with new specializations, talents, and signature abilities. Simultaneously, it introduces new character options for all players, including new species, starfighters, modifications, and equipment, as well as options for alien mounts. These large beasts feature prominently in one of the book’s new Ace specializations but lend advantages to any combatant who rides them into battle. Additionally, GMs gain new tools to help them incorporate Aces, starfighters, mounts, and rivals into a wide range of exciting and memorable adventures.