I have points to make for both sides of this "Is Black Ops 2 in the future?" thing.
Treyarch has always done re creations of wars and they are very good at it. They may use creative scenarios that never actually happened, but they could make sense based on our history. Now my point here is that treyarch has never done anything past the present time because they are good at re creating what has already happened. This leaves infinity ward to create all the current or future warfare, and in my opinion i think they are good at what they do also.
Now, with that said being said, those of you who believe black ops 2 is in the future could also be right and we all know why: ZOMBIES. Treyarch added a creative twist to WaW with their very own zombies mode. Obviously a zombie outbreak has never happened but we all enjoy the gameplay and we also like to follow the zombie storyline which never actually happened. This shows treyarch's creativity which leads me to believe that they could suceed at making a game on something that hasnt happened yet.
After considering both of these viewpoints i have decided to be unbiased about the timeframe of the game because one point is just as good as the other.