We learn that Gabe was given the go ahead to conceptualize the zone in September 2008, shortly after launch and that it will come in two forms: The Necropolis desert, which is an open, non-instanced zone and The Tomb of the Vulture Lord dungeon.
Control over this dungeon will depend on a new Expedition Resource system, which will come as a blend of zone control and open RvR kills. Not only will you fight over the new dungeon, you will fight in it as well and the only safe spot will be the zone-in spot. The dungeon will have instanced encounters, but players will actually be able to storm instances and chase after enemies.
As a PvE expansion to their newly announced RvR token system, monsters in The Necropolis desert will also drop tokens, which can be used to purchase powerful gear and crafting materials. If any of this sounds interesting to you, keep your eyes peeled for the April newsletter.