Bowling didn't drop details on what the first batch of content would contain, though he did hint MW3 DLC would cover a wide spectrum, including Spec Ops and "a variety of things that players have never seen before." All of this is made possible by the massive development team, featuring Infinity Ward, Sledgehammer and Raven Software.
Oh, and if you're having trouble finding this particular video on Call of Duty Elite, it might be because it's in the Elite TV section, which is reserved for premium (read: "paid") members.
Update: Bowling has tweeted an image from the upcoming DLC, a map known simply as "Park." It's worth mentioning that Park was mentioned in a rumored leak late last month. Other maps mentioned included Overwatch, Cement, Italy and (ahem) Morningwood.