Black Ops 2's theme song, USA Today revealed this morning. He's not crafting the whole soundtrack, though, as Mass Effect 1 and 2 soundtrack composer Jack Wall is taking that responsibility.
Reznor said he was led to the project after having composed soundtracks for both The Social Network and The Girl With the Dragon Tattoo. "I started dipping my toe into film scoring. That led me to film scoring agents and whatnot and a variety of projects start to get thrown at you to check your level of interest. And quite a while ago I had heard, 'Would you be interested in a big franchise video game?' Being an avid gamer my whole life, I said, 'Yeah, I would be interested in that.'" Reznor previously composed the soundtrack to Quake.
Call of Duty: Black Ops 2 launches on November 13 for Xbox 360, PlayStation 3, and PC.