It isn't a huge surprise - in fact, let's face it, it's exactly what we expected - but an official follow-up to last year's Call of Duty 4 has now been unveiled. Call of Duty 5 is a go.

According to reports from the latest issue of the Official Xbox Magazine, the new game will be titled Call of Duty: World at War and will be developed by Treyarch, not Infinity Ward.

Call of Duty 5: World at War is going to eschew the modern update of Infinity Ward's recent game and will instead take the game back to the roots of the franchise, which is either a good or a bad thing dependent on how resistant to change you are.

World at War will be set in the Pacific theater during World War II, which begs the question of why the game isn't called Call of Duty 5: World at War, Again.

According to the report from Xbox Magazine, Treyarch is planning to make the game more of a survival horror experience than other games in the series by exploring "the darkest corners of WWII...tackling darker themes" and ptting players against "a new, seemingly alien fighting force."

Infinity Ward, who did sterling work with Call of Duty 4 have not explained why they won't be developing the next game in the franchise.

Lets just hope the game doesn't end up all Warrior Within meets Predator, eh? Tell us what you think in the forums.