Managed to get into a LFR que pop for the second part, which.. was a lot more revealing than the first part.
Here's a couple screenshots of what it looks like. It's absolutely breathtaking when you're actually there in person, or rather, in character.
This could really shape up to be the new Ulduar.
The first part, or at least what we could see of it, looked a lot like Zul'Aman.
Have deserter from leaving second half, so I cant get screenshots of 3rd/4th for a while.
Sorry for not hiding UI.
---------- Post added 2013-01-03 at 04:35 AM ----------
Here, have a picture of a new world boss, too.