User blog comment:FireBird-/MW3's new Survival Mode Revealed!/@comment-3967954-20110528193000/@comment-3472415-20110529014614

That happens sometimes, like how the Modern Warfare 2 map "Favela" was originally going to be in Call of Duty 4 with the same name, and how in Black Ops there were 2 versions of Havanna, one in a medium-sized rundown town, like Favela or Rundown, or how there were 2 versions of Jungle, one like Storm.