At the Final Fantasy 30th Anniversary event on January 31st, Square Enix officially confirmed the release date of the upcoming Gladiolus DLC for Final Fantasy XV. The episode will be released on March 28, 2017. Gladiolus, a character from the game, will be playable in this episode.
Additionally, Square Enix also provided a timeframe of June 2017 for the upcoming Prompto DLC. Like the Gladiolus DLC, this episode will focus on Prompto and feature him as a playable character for the game.
There will also be a "super suit" DLC released for the game on February 21st. The armor will supposedly make the four main characters impervious to damage for a limited amount of time, although it will require a period of 24 hours to charge.
The next Active Time Report for Final Fantasy XV is scheduled for February 2nd. More details about the upcoming Gladiolus DLC will likely appear at this event.