A new DLC has just been announced for Mass Effect 3. Entitled "Leviathan," it'll be released later this summer for PC, PS3, and 360. It is single-player focused and will explorer the origins of the Reapers.
Sadly, nothing was said about "Leviathan" coming to Wii U.
Dragon Age's Jaws of Hakkon DLC is holding off on PS4, PS3, and Xbox 360 until May
5:00 PM on 03.30.2015