From the PlanetXbox360.com feature preview:
"Activision is going in guns blazing with its latest Call of Duty title, Modern Warfare 3. For weeks, the company’s been showing off new media from its upcoming sequel, hoping to catch up on some thunder that’s been stolen by EA’s Battlefield 3. But fans needn’t worry. This latest entry shows no signs of slowing down on action – especially as far as its new Survival Mode is concerned. Activision invited us to go hands-on with the new mode, which kind of resembles the Gears of War Horde Mode in a way or two. Only with explosive dogs."