The release date for Dragon Quest 11 has been revealed for Japan. This is for the 3DS and PS4 versions of the game.
As announced via a livestream, Square Enix revealed that Dragon Quest 11 will be out on 3DS and PS4 in Japan on July 29th, 2017. No Western release date has been announced as of time of publication.
Square Enix chose not to announce a release date for the Nintendo Switch version yet. All they said is that they cannot discuss the Switch release date yet. It’s possible Nintendo wants to save the announcement for another time.
Square Enix also released a new trailer for the game where you can see below. It’s in Japanese, but it still gives you a good look at the game.