In a video message posted on YouTube, Ni No Kuni II director Akihiro Hino announced that Revenant Kingdom will be arriving a little late. Ni No Kuni II is now scheduled to come out a few months later on January 19th, 2018.
Hino-san also issued a statement to clear up comments about Ni No Kuni II possibly having multi-player. Hino-san misunderstood a question during an interview at E3 and thought the interviewer was inquiring about online content in general. Hino-san was actually referring to online announcements of in-game events.
Check out the video on YouTube for the full statement with subtitles.