Along with the new patch, Blizzard began one of the final stages of the pre-cataclysm event. Both Horde and Alliance players will have to help defend their capital cities from the elemental invasion.
After defending their capital cities, players will be able to counterattack the elemental invasion by entering four portals which each feature revamped versions of some classic World of Warcraft bosses.
Since a majority of the current players of World of Warcraft have never experienced the original content of the classic game, 4.0.3 and Cataclysm will allow players to experience new and updated versions of some great boss encounters that were forgotten with the introduction of the previous two expansions.
4.0.3 should be the final patch before the shattering of Azeroth that will come with the release of Cataclysm. 4.0.3a which will come when Cataclysm is released on December 7, will introduce a plethora of brand new quests, zones, and dungeons to the original world of Azeroth that players experienced prior to the two expansions.