has posted an early listing as to what we can expect to find in Call of Duty: Modern Warfare 2's first and upcoming Map Pack - the 'Stimulus Map Pack'.
Currently only available by prepaid code which I assuming only certain people have access to, the description states the following:
The best-selling Xbox 360 game of all-time just got bigger, with more epic multiplayer content, first on Xbox LIVE! The Stimulus Package delivers 5 additional action-packed multiplayer maps featuring a variety of locations: Bailout, a multi-level apartment complex; Storm, an open industrial park littered with heavy machinery; Salvage, a snowy junkyard fortified by stacked debris and crushed cars. Two legendary fan-favorites from Call of Duty 4: Modern Warfare return, including Crash, a war-torn urban environment; and Overgrown, which features a massive dry creek bed.