BioWare has teased that Mass Effect 3‘s final DLC, Reckoning, could be announced late next week.
@08_ice When it is ready to be talked about, it will be. Not my decision, but I think, hopefully, late next week.
— Chris Priestly (@BioEvilChris) February 11, 2013
The DLC is said to combine single-player story choices into multiplayer and contain a co-op mode.