From the front page update.
Considering that, it only convinces me more that this will be a separate game but from the same universe. I don't ever recall Blizzard getting domain names like wrathofthelichking.com or anything like that. It also makes me think Blizzard might not be the only company creating the game. If they were, wouldn't they just shove it on the battle.net site and call it good?
EDIT: And it seems the picture/text from Boubouille's post regarding the website has disappeared. I swear it was there
