Northrend and Outland changes in Cataclysm.

I'd expect there to be graphical changes throughout the game, I'm looking forward to see what comes of Zangarmarsh with the new water effects implemented. As for quests, Blizzard has stated that they wanted quests from level 1 to 85 to feel more like you're accomplishing something beside going and killing 20 bears for some fur scraps. From what I've heard from some people in the beta, even at really low levels the quests seem to be less tedious and much more fun, and I see no reason why they wouldn't bring that to Outlands and Northrend. In particular, there are a couple of quests that come to mind that you won't be able to do in those locations anymore. The first is the fight for Undercity, as that quest line now ends at the cinematic after the Wrathgate quest. Secondly, the major chain in Nagrand for Horde players that ends with you going to Thrall in Orgrimmar and bringing him back to Nagrand to have a talk with Garrosh Hellscream should be going for obvious reasons. I wouldn't expect a full revamp in quests in both locations, but there should be a fair amount of new material. If they're completely redoing 1-60, I see no reason why there won't be some changes from 60-78, although I wouldn't suspect any Cataclysm related quests in Outlands, and few if any in Northrend. Lastly, you might get a kick out of the proposed new loading screen when zoning into Northrend, showing the new Lich King in Arthas' place.

I like that answer! and concerning the loading screen, ive seen the new one, bolvar is placed as the lich king, it looks amazing.