Last week the rumors were there already when the domain name was discovered, but today, during the Square Enix 1st Production Department Premiere, they have announced Final Fantasy XIII-2 for PlayStation 3 and Xbox 360.
The game will be directed by Motomu Toriyam, who also did the original. The game is planned for release this year in Japan.
Update: This Thursday an official trailer will be released at the official website.