Mythic just announced that "The Verminous Horde" RvR packs and Game Update 1.4 will launch in Warhammer Online on Nov. 18. The patch is free, but the pair of RvR packs will be available in the EA Store for $10 each or $15 for both.
The most recent producer's letter provides all sorts of details on the upcoming patch and RvR packs. In addition to the playable Skaven race, Game Update 1.4 will include an entirely revamped ORvR zone capture mechanic and the Skaven dungeon Thanquol's Incursion. The Progression and and Personality RvR packs offer mounts, vanity pets, accelerated leveling and more.