Included with the preview are some unsettling images of Wyrmrest Temple crawling with the tentacles of Old God minions, as well as some shots of the surrounding areas. There are three bosses mentioned with the preview: Arcurion, a formidable water ascendant who is tasked with killing Thrall; Asria Dawnslayer, a deadly agent of the Twilight's Hammer; and a third face who should be instantly recognizable to Alliance players. If you want to avoid spoiler content, I'd avoid the preview, but the third boss is a shock for those familiar with him in game so far.
Did we mention Thrall? That's right, he's there too, and players must escort him and the Dragon Soul safely to Wyrmrest Temple. I'm having flashbacks to CoT: Durnholde Keep, but they are good flashbacks. From the looks of things, these events tie directly into Thrall: Twilight of the Aspects; those who are wanting to know more about the events in Hour of Twilight should check out that novel.
All in all, it looks like the three dungeons are similar to the last three dungeons of Wrath of the Lich King. They tie into the final raid encounter in a crucial way, and the story is interlocked between all three dungeons. Check out the official website for the full preview, plenty of images, and more boss information.
Brace yourselves for what could be some of most exciting updates to the game recently with patch 4.3. Look at what's ahead: new item storage options, cross-realm raiding, cosmetic armor skinning and your chance to battle the mighty Deathwing -- from astride his back!