"We knew that the story of the characters from Black Ops I hadn't finished."
A portion of sales from the DLC promotion will be donated to the Call of Duty Endowment.
Nuketown, Call of Duty: Black Ops' most popular multiplayer map, is to be re-imagined as Nuketown 2025 in Black Ops 2.
Leaked images imply a near-future setting.
There's some morse code on the Call of Duty teaser site that says, when magically transmogrified into English, Black Ops 2.
An online advertisement for Call of Duty: Black Ops 2 has hit the net ahead of Activision's official announcement on May 1.
Activision has launched a countdown to the world premiere of its next Call of Duty game, expected to be Black Ops 2 from Treyarch.
Is Activision gearing up for a Call of Duty: Black Ops 2 reveal in the next two weeks?
Sales of the most recent CoD are 4.2 per cent behind where Black Ops was in the same period.
This year's Call of Duty game will be Black Ops 2, a sequel to 2010's hugely successful title from Treyarch, according to leaked information posted on the official Black Ops forums.
This year's Call of Duty game - could it be Call of Duty: Black Ops 2? - will see "meaningful innovation" for the well-worn FPS juggernaut, Activision has said.