Blizzard trademarks lotta things, the company always works on too many projects, but only a few reach the shelves. This time, the enterprise has trademarked ‘’The Dark Below’’. This name could be related with Diablo III or World of Warcraft, not with Starcraft. The Dark Below could be the next expansion for any of those games, but apparently is much more closer to WoW than D3.
The Dark Below is mentioned in the title of the boss Ozumat (Friend of The Dark Below). That’s the only canon mention of this place. One way of another until official confirmation this name could be an expansion for Diablo III or World of Warcraft. We have other possibility, Blizzard could cancel the project and maybe we never would hear anything again about The Dark Below.