Here are the parts I found the most interesting:
- Sunwell Plateau is the evolution of what Naxxramas was for the original game. They learned some lessons from Naxx; for instance, Naxx was just too big for many guilds to be able to get through it before The Burning Crusade hit.
- Northrend will have "a very Nordic, gothic fantasy feel" -- sounds cool! To set the scene, players will be rewarded with "Northrendy" items early in Wrath: "for example, say, a two-handed axe that's made of a dragon jaw, covered with spikes, leather, and other traditional materials. We want players to see the new gear and think, 'Yeah, that guy's been to Northrend.'" I want my dragon jaw axe now please. Er...you can make that with +heal, right? And give priests axe skill?
- As the player treks through the zones of Northrend, the landscape gets bleaker and players get more spread out, escaping the hyper-population of the starting zones. Blizzard wants to invoke a "growing sense of isolation and dread" as players get closer to Arthas.
- The two starting zones are at opposite tips of crescent-shaped Northrend. They wanted to give us an easy way to travel between them, so we get boats. But not just any boats -- turtle boats! Brack talks about "a giant turtle with a deck mounted on top of its shell." Best form of transportation since Captain Placeholder, if you ask me.