Details of second map pack of Modern Warfare 2
It seems that Infinity Ward will be following its earlier formula for its new map pack for Modern Warfare 2. Recently community manager of the studio, Robert Bowling, shared some details about the Resurgence Pack.

He said that the Resurgence Pack will be sold for 1200 points ($15) and as the earlier Stimulus Package, this map pack also feature five maps, in which there are three new environments and two maps updated from Call of Duty 4: Modern Warfare. These two are
Vacant, set inside an open Russian complex, and urban environment Strike.
Below are the details of three new maps as shared by Robert Bowling:
Carnival – This map is set inside a “desolated amusement park” and it has unique locations like a rollercoaster and fun house.
Trailer Park – Bowling says that this is a cozy map and it features abandoned trailers and tight corridors. He also says further that this map is like a maze with various chokepoints.
Fuel – This is like a “sniper haven”. It is based in an oil refinery and according to him this is one of the larger environments of the game.