In Call of Duty Black Ops, we noticed the pattern "FEAR" in their DLC's:
And in Black Ops 2 - we only currently see:
And my theory consists of the Black Ops 2 pattern - Rift. I am here to explain why, so here we go:
In Black Ops 2 - the word RIFT is mentioned a lot, in the Die Rise cinematic for example, along with Richofen who appears to rift the group into other destinations in the world.
Let me also quickly say - in the Die Rise cinematic, Stoolinger appears to be biting a human arm(?) and just before that, we see him with a leg wound, leading to my theory; he is a zombie, he was infected.
Injured Leg - [url=http://i.imgur.com/JJpZzDO.png]Here.[/url]
Eating Human - [url=http://gyazo.com/033c542f9d1679ceb9958b55d29b530f]Here.[/url]