User blog comment:Mr. Mittens/Mystery Screenshot from Comic Con Identified?/@comment-4118072-20121003204153/@comment-1221773-20121003210931

Wild guess: it's Tazzik.

At the very least I think it's a salarian or drell because of the facial structure. If it was a new race or one we haven't seen before like the raloi (as BSN seems to think), it would make more sense for BioWare keep a detail like that secret instead of outing it before the DLC is even formally announced. One of Lair of the Shadow Broker's biggest moments was the surprise reveal of the yahg, after all.