I want map packs from all the games in individual packs. Even redesigned WaW maps in Modern Settings. It would be easier than designing completely new maps.
Particularly I want:
Crossfire, Countdown, Backlot, District, Chinatown, Creek and Shipment from CoD4
Dome, Makin, Upheaval, Courtyard, Castle, Corrosion, Sub Pen and Cliffside from WaW
Rust, Favela, Highrise, Karachi, Invasion, Quarry, Rundown, Scrapyard, Sub Base, and Terminal from MW2
Wow, after listing all these I wonder why they should even design any new maps.