User blog comment:Mr. Mittens/Mystery Screenshot from Comic Con Identified?/@comment-4950455-20121004043930/@comment-5287758-20121004044741

Cerberus has dreadnoughts? It definitely looks like an Alliance dreadnought. And the hologram looks like the lower part of Omega.

As for the person standing beside Shepard, his/her posture looks like a human to me. The build seems too heavy to be a quarian or a salarian. Perhaps its an Ex-Cerberus guy?