From their website:
Fantasy Flight Games is thrilled to announce the upcoming release of Rex: Final Days of an Empire, a board game of negotiation, betrayal, and warfare. Three to six players will embark to take control of ancient interstellar civilizations competing for dominance of the galaxy’s crumbling capital. Set 3,000 years before the events of Twilight Imperium, Rex: Final Days of an Empire tells the fateful story of once-proud Mecatol City in the months and years following the death of the last Lazax emperor.
Rex: Final Days of an Empire is based on a game system originally designed by Bill Eberle, Jack Kittredge, and Peter Olotka (Cosmic Encounter) and redeveloped for a new audience through the collaborative efforts of Christian T. Petersen (Twilight Imperium, A Game of Thrones: The Board Game), John Goodenough (Tide of Iron), and Corey Konieczka (Battlestar Galactica: The Board Game, Runewars).