The patch notes for Star Wars: The Old Republic game update v5.2 The War of Iokath have been published on the official site. The patch is expected to launch later today with new content. On the narrative side, a pair of old companions will return: the Sith Warrior companion Malavai Quinn and the Republic Trooper companion Elara Dorne. In addition, a new operation called Gods from the Machine will open as well as the brand new Galaxy Map.
Other notable features include:
You can read the full update notes on the Star Wars: The Old Republic site.