Following the announcement of the release date, Square-Enix has also confirmed something else about the game: The presence of DLC.
While DLC will exist for the game, it will not be launching until sometime after it releases. As to what the DLC will be, we aren’t sure yet. Anyone who pre-orders at certain outlets in Japan will receive bonus DLC for the game. The contents of that is also unknown and will presumably be announced at a later date closer to its release on December 15th.