Square Enix’s official hub for Final Fantasy XIII is Finalfantasy13Game.com. It appears that on January 10th, 2011, someone also registered Finalfantasy13-2Game.com as a domain. The report comes by way of Superannuation’s Twitter feed.
Finalfantasy13-2Game.com was registered under the name of “Corporation Service Company,” whose name is also listed in association with websites for other Square Enix games such as Nier and Final Fantasy XIII.
Square have stated the possibility of a follow-up to Final Fantasy XIII in the past, but have never explicitly confirmed if they have plans for one. If they are indeed working on such a game, perhaps we’ll hear about it at their upcoming 1st Production Department conference on January 18th.