Final Fantasy 13-2 has been dated for Japan and North America. Often, Japanese games will come out in Japan months before they are released in America. Good news for American FF fans, they'll only have to wait one month. Final Fantasy 13-2 will be released this December in Japan and in January 2012 in America.
Final Fantasy XIII-2 will be released on the PlayStation 3 and Xbox 360.
If you're going to Comic-Con this week, keep an eye out for FF13-2 at the Square Enix booth.