So, the Lich King attacks the center of the horde, but the unloved stepchild of the Alliance? That seems fair
IMO, the razing of Darnassus is more symbolic than the razing of Stormwind City. Also, it will prove as a catalyst for the increased High Elven presense in Northrend.
The thing that interests me most is what prompts the Lich King to attack Org and Darn and if it ties into the Horde/Alliance actions in Outland or more importantly in Sunwell Plateau.
Also, Storm Peaks will be a very important area for the Titans storyline. I explored Ulduar on a sandbox and the surrounding area and it seems like the Titan storyline will jump heaps and bounds here, including what seems like some Titan artifacts.
There is also the question of the Dragon Aspects. We have already discussed in the other thread about Noz and how he could actually be the leader of the Infinite Dragonflight for whatever reasons. Also, I beleive there is some area called Nefarian's Cave (or something like that) which contains one human in there right now, which was interesting to me. Blizzard maybe going for big revival of the Black Dragonflight storyline.