According to WHOIS data, the domain name ProjectBlackstone.com was recently registered by developer and publisher Blizzard.
No concrete details as to the nature of “Project Blackstone” are currently available, although one potential answer could be that the project is an expansion to Diablo III, something which Blizzard has already confirmed as being in development.
Another project which is a potential contender for being connected to “Project Blackstone” is Blizzard’s upcoming MMO Titan, which is currently in development and about which few details are known. Alternatively, of course, the new domain name could involve an all-new project.
[Via: IGN]