Additional DLC is planned for the remastered version.
Let’s sum it up: Modern Warfare Remastered is a bonus for people buying Call of Duty: Infinite Warfare. There’s a season pass for the main game that offers four map packs in total, with only one being released until now. And the game that’s a bonus which cannot be obtained separately gets a paid DLC with maps that were DLCs for the original game.
Call of Duty: Modern Warfare Remastered Variety Map Pack, as it is briefly titled, contains four multiplayer maps. That includes fan-favourites: Chinatown, Broadcast, Creek and Killhouse. There’s nothing more for me to say, so I’ll leave you with the trailer.