While details are still very sketchy, GameSpot has learned that Homeworld developer Relic Entertainment has signed a publishing agreement with Microsoft for an undisclosed game. We spoke with Relic president Alex Garden, and according to him, the game won't be the rumored Homeworld sequel, as Sierra still has the rights to that title. Garden wouldn't reveal any other details about his company's new arrangements. Hopefully, we'll learn more information at E3 in May. Stay tuned.