User blog comment:Argorrath/Activision confirms next Call of Duty for this year/@comment-3111946-20130210142435/@comment-1187559-20130212233421

Pwny, it seems redundant to have a feature from a zombie game and saying they did it first so CoD didn't innovate. It's like saying "TES had a storyline, so the campaign of CoD 1 wasn't innovating". For the Call of Duty zombies mode making the character a zombie was a new innovation.