It looks like the new 5 man Icecrown instance has a blurb on WoW Europe and it's going to be crazy. There are three wings, each wing has its own lockout timer and you'll need to take each one out during an epic quest to advance. Guess who's the endboss? Arthas himself. You get to Jaina and Sylvanas out too. Sounds like fun, right?
World of Warcraft Community Site
(via tentonhammer, thx!)