http://finalfantasy-xiii.net/2010/01/27/rumour-final-fantasy-xiii-dlc-coming-soon.html
A Neogaf user has apparently received the latest issue of the Dutch Playstation Magazine which contains an 8 page Final Fantasy XIII feature including a 2 page interview with Kitase. In the interview, Kitase discusses the failed simultaneous release Square previously aimed for as well as future plans for DLC.
Is the European version identical to the Japanese version or will the western version get extra content for the long wait?
Kitase: At first we had plans to release the game simultaneously worldwide, so we had the intention to deliver identical version between the regions. When we noticed that we wouldn't make it, we decided to release the game as fast as possible in the west after its release in Japan. We initially had doubts to add extra content to the western version but then it would have taken the international version more months of delay. We did prepare a DLC but it will arrive a little later in the west.
Hopefully scans will appear soon confirming the downloadable content.
Source: Neogaf