User blog comment:Mr. Mittens/Mystery Screenshot from Comic Con Identified?/@comment-4118072-20121003204153/@comment-1679409-20121003222211

Perhaps we can eliminate possibilities first. It's obviously not a krogan, volus, elcor, hanar, or yahg. The lack of a mask seems to rule out quarian and raloi (unless the raloi use clear masks). It looks green or gray, which would rule out the asari. It's hard to tell, but I only see two eyes (no batarians). It also doesn't really look human. I don't see the razor-sharp teeth of a vorcha.

So, that leaves turian, salarian, or drell. Or possibly even a new race! I'm leaning toward turian or salarian due to the coloring (then again, it's hard to tell for sure).