During Activision's fourth quarter earnings conference call with investors yesterday, the company announced that the Call of Duty and Guitar Hero series will be continuing.

"Activision (ATVI) has confirmed that three times as many Guitar Hero SKUs will be coming in the next fiscal year, as well as that Call of Duty 5 will be released for Wii, PS2 and DS, in addition to Xbox 360, PS3 and PC.

With regards to Guitar Hero, the company commented that there will be three times as many SKUs during the next fiscal year. An SKU refers to any particular platform of a game, so Guitar Hero III: Legends of Rock, released on Xbox 360, PS3, PC, PS2 and Wii represents five SKUs. The company hinted that other studios will be joining Neversoft in handling additional versions of the game. Vicarious Visions is currently working on the DS version of the game, Guitar Hero On Tour, and the company confirmed that it will be bundled in a Nintendo DS package by Nintendo (NTDOY.PK).

Activision did not release any details on Guitar Hero IV but did comment that the series is "extremely expandable." Rumors point to the inclusion of drums and vocals in the next entry of the game. The publisher did confirm that the next Call of Duty game will be released for Xbox 360, PS3, Wii, PS2 and PC but did not comment on the game's developer. In addition, Infinity Ward's Call of Duty 4 engine will be used in the next James Bond apartment."

Source: SeekingAlpha

In addition, the Preseident and CEO of Activision said the following about Call of Duty 5:

"For Call of Duty, we’ll bring the intensity of the recent Call of Duty: Modern Warfare title to yet a new military theater, to engage our significantly larger user based, which nearly doubled last year as new users came into the franchise."

You can view the full conference call transcript at SeekingAplha.