We recently learned that Wizards of the Coast plans on creating terrain packs to be made available for sale at hobby stores, also known as Friendly Local Game Stores.
Paul Barclay from Wizards informs us that the hobby stores are unable to stock Master Sets, they simply can't make a profit from them. This leaves a dilemma when trying to bring HeroScape into the hobby market, as you can't play the game without the terrain provided in Master Sets. Wizards' solution is to create terrain sets that are heavy on hexes and include a couple of line of sight blockers.
One such set is a Desert Terrain Set that will make use of repainted Glaciers from the Thaelenk Tundra Set. Paul sent me a conceptual picture of this Desert Terrain Set. Note that this is not necessarily how the final product will look.