The Sons of the Storm website was updated recently with 15 new concept art images.
Some of these show the covers of the DC Comics World of Warcraft: Curse of the Worgen comic book mini-series.
Some images show the Twilight Citadel zone-in tower, the Tol’vir, Worgen vs Goblins, Maiden of Virtue, Worgen Den at the Blackwald (hmm, kinda different to what we see in-game). Corborus (Stonecore dungeon boss) The Curator (Karazhan), the StarCraft: Devil’s Due cover, and more.
The Sons of the Storm launched a Facebook page which reached 1,153 “Likes” so far.