Source: http://www.destructoid.com/the-next-modern-warfare-3-dlc-adds-a-new-mode-and-tanks-227325.phtmlModern Warfare 3 Collection #2 is set to introduce a ton of new stuff for Call of Duty players. The biggest new addition being the new Face Off mode, where players can engage in 1 vs. 1 or 2 vs. 2 battles on four new smaller maps. Two of these maps (Aground and Erosion) will be released ahead of the main content collection pack for free to everyone on May 16, with Elite subscribers getting these two maps on May 15.
Additionally, there will be three new multiplayer maps (Sanctuary, Foundation and Oasis) plus two new Special Ops Missions. Of particular interest is the Iron Clad Spec-Ops mission where you can use an actual tank now. One player drives the tank, while the other player is on foot clearing a path for the tank driver.
All this content will be released for free to Elite Premium members on May 15, and available for sale on May 22 for 1200 Microsoft Points. Check out the trailer to get a glimpse at all the new maps too. Note that all this new content is arriving first for Xbox 360 players, with PlayStation 3 and PC players set to get all this way later than they really should.