So tomorrow (today if you're in the US) we'll have access to the last wing of Icecrown Citadel. The new Arena season should start too and we'll have to download patch 3.3.2.
You can find all the news and the patch notes on MMO-champion, on the Fall of the Lich King page. Take care huge spoilers there :P
I'll note the changes to the T10 plate tanking armors (which are receiving a little up). The new str dps Ashen Verdict rep ring. Class wise, warriors and warlocks are mostly the only ones changed.
We'll have a new boss in Wintergrasp too (sigh ... the biggest failure of all LK fmpow).
And finally we get the last wing of Icecrown with my favorite boss I can't wait to try: Valithria Dreamwalker.
I wish you all a lot of fun, we're finally coming to the end of this whole extension.