Here is a preview of what SOE describes as a x2 Raid Zone that is on par with the difficulty of Kurn's Tower. 8 Images and one Exclusive Preview Video.
Expect to see more updates in the coming days for the x4 content leading up to the release of Sentinel's Fate.
[media]http://www.youtube.com/watch?v=LKjjz9gO0DE[/media]