Square Enix announced today at an event held in Japan that Final Fantasy XIII-2 is in production and will be released in 2011. It is unclear if this release window applies to Japan only or whether it will be an international release in 2011.
Little has been released about FFXIII-2. The new logo above shows a character who is said to be similar to Lightning in temperament. It is rumoured to be a man with purple hair.