User blog:Crazy sam10/Black Ops II confirms 'one' ending.

Treyarch in a recent statement have confirmed that Black Ops II will have one ending, but with slightly differing events, similar to that of certain RPGs.

"Those success and failures are catalogued so that - at the conclusion of your single player experience - if you have succeeded at all your Strike Force levels, you will have a different geo-political 'wrapper' around the conclusion of your game. This wrapper would be different than the one I would have seen if I played through and failed all of my Strike Force missions," Rafacz continued, "Now, succeed or fail, if you want to go back and replay them, or choose different Strike Force missions, you can do that. Well, you know, it's still in development. So it's too early to kind of talk about how many endings there are, but it's safe to say that throughout the course of the campaign, you will have the opportunity to play a handful of Strike Force levels. I think the important thing here - and you touched on this - is that it's the geo-political wrapper, we will all share that same story, we are playing that same gift, we just get different colour wrapping paper."

- John Rafacz

The quote "we will all share that same story, we are playing that same gift, we just get different colour wrapping paper." makes the ending seem very similar to that of Mass Effect 3's 'different colour' endings.

Source: Nowgamer