A new Naruto Storm 3 scan featuring the new story chapter, Sasuke and Itachi vs Kabuto, has been released. As can be seen on the scan, it has been confirmed that this DLC will be released on the 24th of October in Japan.
Considering the fact that Naruto Shippuden: Ultimate Ninja Storm 3 Full Burst will be released on the 22nd of October in North America, it's safe to assume that the Story mode DLC will also be released on the same day. As for Europe, neither the game or the DLC have a release date, but both are confirmed to be released this Winter.
Naruto Shippuden: Ultimate Ninja Storm 3 Full Burst will feature an additional chapter to the game, a new playable character, revamped cinematics, 100 new missions, and the 38 DLC costumes released for the game's original version. In addition, North American fans that pre-order from GameStop or EB Games will also receive a 190-page, full color manga size artbook.