Official announcement: https://forums.stardock.com/457624/page/1/
VentureBeat article: http://venturebeat.com/2014/09/09/age-of-empires-developers-releasing-new-game-with-stardock/
BonusXP, a company founded by senior Age of Empires developers, announced this morning that they will publish an upcoming PC strategy title with Stardock Entertainment, best known for the Galactic Civilizations series.
They did not announce the content or release date of the new game. It will use what Stardock is calling Project Tachyon, its new matchmaking and cloud-gaming service. They are designing Tachyon to work with existing systems like Steam, adding matchmaking, league play, cloud-hosted multiplayer contests, and progress tracking on the web.