While it had been known to be in development since last year and even was the subject of a recent preview (story), Ubi Soft has now formally announced Battle Realms: Winter of the Wolf, the upcoming expansion pack to the 3D real-time strategy game by Liquid Entertainment. Winter of the Wolf is slated for a Fall 2002 release, the press release also mentions a rebate offer for owners of the original game, and offers this description of the game's premise:

Battle Realms is a fantasy, real-time strategy game inspired by Japanese mythology and traditional kung-fu cinema. The depth of the Battle Realms mythology intertwines stories from several clans, each with its own unique origin and culture. Winter of the Wolf takes place seven years prior to the events in the original Battle Realms and accounts the proud Wolf people's rise from oppression and slavery under the Lotus Clan. The Wolf Clan's rise to power occurs over the course of twelve all-new scenarios. As heroic Wolf leader Grayback, players must journey through dark mines and snowbound forests to free the clan from the tyranny of the Lotus Mages, and save the land from a fierce, magical winter.

Additionally, the press release is accompanied by three high-res screenshots, although two of them were already included with the aforementioned preview in a lower resolution.