Take-Two Interactive confirmed that plans for a sequel for the successful “BioShock” video game are already on the drawing board for a future game release.

In response to a question during a recent investor conference call, Take-Two Chairman Strauss Zelnick indicated that a two-year cycle is about the right time frame for most game franchises before a sequel is launched.

And, while you are waiting the estimated 24 months before the launch of a BioShock sequel, it is good to note that BioShock has sold an amazing 1.5 million units since its launch roughly three weeks ago. These numbers are pretty strong to ensure the launch of a new franchise title. No additional details were released as to what the sequel might be titled or the contents of its story line.

While the PC version of BioShock has experienced some rough acceptance due to the new DRM/Copy protection employed by Take-Two, it seems that due to some adjustments by Take-Two things have quieted down regarding the DRM/Copy protection. In addition, some reports indicate that Xbox 360 BioShock players have encountered a few bugs, including a bug that causes the game to freeze. The latest patch for the Xbox 360 version of BioShock seems to fix some issues, but does not fix them all.