As part of a live stream celebrating 35 years of Dragon Quest Games, Square Enix announced six titles, including the next major match of the series: Dragon Quest XII: Flames of destiny.
We have not seen anything on the game other than his burgled logo, but the flow indicated that it would be a more adult experience than the previous games, who asks players to make choices about how they want to play. They also mentioned that the game will have an updated combat system, but did not mention specificities.
The other titles mentioned during the stream included a mobile puzzle game, a spin-off called Dragon Quest Treasures, the Remake Dragon Quest III HD-2D, an expansion of Dragon Quest X Online and a new version to a player of this mmo called Dragon quest x offline.