Firefall, and it promises to be a big one. A brief overview of the game's next major update has been posted on the official site to show off some of what players can expect, starting with the new Operation: Miru. This is endgame instanced content designed for five players at level 40, featuring a combination of mechanics and gunfights that heretofore have not been present in the game.
The update will also feature a new piece of open-world content via the Accord Skydock, a new form of watchtower content, and a new live event. Broken Peninsula has also received updates to make it less broken from a mechanical standpoint rather than a geographical one. You can read up on all the sketchy details here, and keep your eyes peeled for more hard information as it becomes available.