Apparently... The Omega DLC is tomorrow.
I wasn't even following when it would be released so it kinda snuck up on me. But I'm surprised it's being released so soon, I was expecting it to be in mid December. But anyways, a trailer.
http://youtu.be/28UgSPUkAss
In an interview (from another video) it was stated that your usual squad mates won't be selectable, only Aria and a female Turian are usable during the entire DLC. Also, the DLC is approximated to be 4 hours long, but I guess that's depends if you know where you're going and know what to expect from battles.