Square Enix plans to conduct a livestream on YouTube and Nico Nico Live which will be “packed with Dragon Quest information.”
Starting on July 28 at 5pm Japan (9am GMT, 4am ET), the stream is expected to confirm Dragon Quest XI and perhaps details on other Dragon Quest games, such as Dragon Quest Builders and Dragon Quest Heroes II.
The presentation will last for one and a half hours and can be found at this link, or by bookmarking this page.