Maw of Neltharion is referred to as Deathwing's Lair. However, it's very uncertain if Deathwing will exist in Wrath of the Lich King, only time will tell. Even just approaching this area makes the sky go red and it's definitely a place that has some form of significant meaning. You can view a short video and screenshots of this area below.
Depending on the status of our media server, I hope to be able to post some even more interesting previews later today -- so check back "in a bit"(tm).
Also, don't forget to check out the rest of our WoW news.