WorldofWar.Net identifies a number of forum posts from the developers at Blizzard outlining changes planned for World of Warcraft, outlining class-specific changes for the Priest, the Rogue, and the Shaman in the MMORPG. An overview is in this post:

As many of you know the next major content patch will include some very exciting things, such as Ulduar, a new epic raid dungeon, a wealth of new items, and much more. We thought players would especially enjoy reading just a few of the class changes we're currently planning.

This is the first in a series of three upcoming class change highlight announcements: Priests, Rogues, and Shaman. Please keep in mind, that these lists are not at all comprehensive, and subject to change.