Game director Tetsuya Nomura announced at the "Kingdom Hearts Orchestra – World of Tres" concert in Los Angeles on Saturday that the planned DLC for the Kingdom Hearts III game will launch this winter. Nomura showed a trailer for the DLC at the event.
Square Enix released the game on January 25 in Japan for the PlayStation 4 and Xbox One, and on January 29 in the West. The game had shipped more than 5 million copies worldwide, including digital sales, as of February 5, and is the fastest-selling title in the history of the franchise.
Source: Kingdom Hearts franchise's YouTube channel