Final Fantasy XIII’s ‘Ultimania Omega’ was just released in Japan and with it, some interesting information was revealed.
Originally FFXIII was planned to have DLC released. The DLC was titled the “Seventh Ark”. It was to be accessed via the warp gate in Orphan’s Cradle. This DLC has since been completely cancelled for both the PlayStation 3 and the Xbox 360, these included both technical issues and download problems.
Yoshinori Kitase, the game’s producer, touched on the possibility of a sequel for FFXIII. Kitase said that if there was enough demand for a sequel then it will definitely be considered. Though at the moment the team is already at work on another project, considering Kitase says that he wants to release a title every 2 years.
[Source]