So close to Zombie Mode

"Call of Duty 4 set in a dark fantasy world ruled by Universal Classic Monsters."

Terminal Reality had a design document on the table for a Monster Mode. Is this the origins of Call of the Dead?

I think this could have been legitimate (monster) competition for Zombie Mode.

Destructoid: Call of Duty meets monster movies in leaked design doc.

An anonymous source has given Destructoid a portion of an internal document from developer Terminal Reality outlining an unannounced project with the working title, "Monsters." Dating from 2008 with an expected release window in the fourth quarter of 2012, the concept for the game is described as, "Call of Duty 4 set in a dark fantasy world ruled by Universal Classic Monsters."

Via N4G.