In an interview with Famitsu, the Final Fantasy XIII-2 team said the game’s story is between 30 and 40 hours long. What happens after you complete it? You can reload your cleared save data and warp back to the point right before you fight the last boss.
Final Fantasy XIII-2 will have a lot of additional content released as DLC, the first pack being the Omega boss battle in Japan. More boss battles will are planned as future DLC. Square Enix will also release additional costumes. Some of the DLC will be free and other items will be paid. Select items will be pre-order bonuses like the Genji Bow, a special weapon for Serah. The publisher says they have no plans to distribute these digital items any other way. Square Enix planned enough DLC to keep Final Fantasy XIII-2 going until spring 2012 with monster or enemy packs released every two weeks.
Have Final Fantasy XIII save data? That will unlock an in-game item, and according to Famitsu players will get some kind of wallpaper.
Final Fantasy XIII-2 makes its debut in Japan on December 15 with a North American release set for January 31, 2012.