Bioware's working on the next DLC for ME3.
Not much is really known yet what the DLC will be about, but for lack of a better word, it's probably going to be pretty epic.
They brought back Sam Hulick to do the score. He's the guy who worked with Jack Wall to do the music for ME1 & 2, and the music for those were pretty freakin awesome.
He also tweeted this
. So that's pretty awesome.
They also brought in Raphael Sbarge, who voiced Kaiden Alenko, and Seth Green to record some lines.
So far it's shaping up to be the "Grand Finale" in regards to storyline DLC.