This is from http://callofduty.wikia.com/wiki/Cal...dern_Warfare_2 .

"Activision has announced that they plan to release a minimum of two downloadable map packs for Call of Duty: Modern Warfare 2.[5] Microsoft announced at E3 2009 that these map packs would be available for the Xbox 360 via Xbox Live before they would be released on other platforms.[6] It is set to be released in Spring 2010.[7] The first map pack, the Stimulus Package is to include five maps; two from Call of Duty 4: Modern Warfare, Crash and Overgrown, and three new maps, Complex, Compact, and Storm."