Hidden in the Mass Effect 3: Extended Cut DLC was a code that suggested more Mass Effect 3 DLC is on the way. The existence of the DLC has since been confirmed via a Tweet from BioWare's own Mike Gamble, who said, "Would now be a good time to talk about how we're doing more DLC in the future?"
The upcoming pack, which for now has been unofficially dubbed "Leviathan" was originally found by the BioWare Social Network and has been posted in full on Pastebin. Read on to learn more about the Mass Effect 3 Leviathan DLC, but consider this your spoiler warning.
The DLC will follow Shepard on his journey to save a scientist named Ann Brynson from a Reaper-indoctrinated mining colony. It'll be up to Shepard and crew to infiltrate the colony, which has been under the control of a Reaper named Leviathan for almost 10 years. Based on your choices, Brynson can either live or die.
However, even though the DLC will send you on a rescue mission, the real focus will be the Reapers themselves. Leviathan is referred to as a defector in the game's script, which leads us to believe he'll be able to join your crew to fight against the other Reapers as a War Asset. Hopefully Leviathan he'll even be able to offer a little more insight on his "race" and its creators as well.
The Mass Effect 3 Leviathan DLC currently doesn't have a release date, but as we get more information we'll be sure to update you.