Okay, here are a few things that I have thought about in CoD.
The Zombies in Nazi Zombie mode on CoD. Should they be considered canon to the CoD series, or should they just be considered non-canon? Same thing with Hellhounds.
Should they make a Zombie mode for the Modern Warfare CoD games?
Should there be a CoD game that is focused purely on Zombies, both modern and Nazi?
Please tell me your thoughts on this, as I am interested in Zombie apocalypses! =D