The collective on the Lord of the Rings Online forums has found a rather interesting tidbit. The official interactive map shows some new “in-game” geography approximately where Dunland could be. The area is just to the left of the Waterworks, and if you flip from Terrain to Parchment, you will see the region-in-question disappear. If you scroll in enough you can see rez-circles and a town. Looks like Volume 3 might be pushing through the Gap of Rohan. My guess is Rohan will be in the next buyable expansion, and Isengard will be the culmination of Volume 3.
break on through, to the other side