Via Gamespot.com:

Star Wars Battlefront’s Death Star expansion came out on September 20 for people who own the game’s season pass. As with all Battlefront expansions, season pass-owners get a two-week headstart. Two weeks have now passed, so starting today anyone can buy the expansion, which is priced at $15.

As of 7:15 AM ET, the Death Star content is not yet available to buy on Xbox One. It should come be out on all platforms later today. We’ll update this post when that happens.

Death Star is Battlefront’s third paid expansion, following Outer Rim and Bespin. The fourth and final one, Rogue One: Scarif, comes out this holiday; it is based on the upcoming movie. The Death Star expansion added five new maps and the Battle Station mode that basically lets you recreate the scene from A New Hope where Luke Skywalker blows up the Death Star. There are also more weapons and Star Cards, while Chewbacca and Bossk have been added as hero characters.
Additionally, Battlefront’s level cap has been raised to 90. A patch released alongside Death Star in September also made a number of hero/villain changes and fixed a lot of bugs.

In other Battlefront news, the servers for all platforms were updated in the past day to improve the stability of larger game modes. The patch also fixed an unspecified credits exploit, EA wrote in its forums.