A user over at Bioware Social Networkth have discovered some hidden files in the recent Extended Cut DLC that’s pointing to the next DLC which will feature a rogue Reaper called Leviathan. It can be found on Pastebin.
The DLC will have Shepard and his crew sent to save Ann Bryson at a mining facility that’s been under the control of the Reaper Leviathan for the past 10 years. Upon completion of the mission, it is presumed the Reaper will be available as a War Asset.
Mass Effect 3 producer Mike Gamble teased that there will be an announcement coming soon.