Journey back in time and side with Arthas to burn it all!
Blizzard discussed several of the instances that will be coming out in the Wrath of the Lich King (WotLK) this past weekend at the Worldwide Invitational in Paris. Byron "Messiah" Mudry was there to cover the event, and has all the details on yet another very cool instance being added in WotLK. Blizzard will be sending players back through the Caverns of Time (CoT) to assist Arthas before he became the Lich King in the level 80 Culling of Stratholme instance. This heavily scripted instance promises to be very interesting.
As with most CoT instances this will be a heavily scripted affair, much like the Old Hillsbrad instance. In it you will join Arthas and fight by his side as he attempts to purge the infected city. Arthas did this after he realized that the population was already infect by the grain sent by the Dreadlord Mal'Ganis, and if they were not purged they would come back as members of the scourge. It is a direct replay of "The Culling" mission from Warcraft 3 and was one of the last acts before he went insane and became the Lich King.
You can read all the details in the Sneak Peak - CoT: The Culling of Stratholme.