This is only something logical I came up with, there is no need to troll about it, if you don't believe it.
Cataclysm Trailer contained a spoiler for possible 3.4 (Cataclysm pre-patch).
As it was unveiled, Arthas should be unlocked in Icecrown Citadel in April, if we calculate that every new wing unlocks every 28 days.
Now read this carefully, this is the start of Cataclysm Trailer. If you don't believe it, go watch it on YouTube, I would link it to you, but can't since this is my first post :P
"As the terrible war against The Lich King continues, the proud defenders of Azeroth fight to secure a lasting peace. But there can be no peace when the world itself is devoured by rage. An ancient evil has risen determined to shake Azeroth to its foundations, and the world will never be the same."
So that can only mean that 3.4 pre-patch will be released before April 2010...ofc if they follow the timeline.