Hmm, so what about this guy? Seems like all he said was true.
I still don't buy the part about "The Dark Below", however he is now harder to dismiss, since there's a decent chance that he actually had some insider info.
While I would love this to be true (as you can see by my speculative rambling above) the chances of this actually being true are quite small. If you look at how trademarks are usually trademarked, they are never this far in advance. If Titan truly was The Dark Below, and the trademark was real, we would've seen something at this years blizzcon. Else it would make no sense to trademark something so soon.
I'm gonna go ahead and carve this up to a guy with inside knowledge about WoW, but which knew nothing of Titan.