The following comes from former-Famitsu chief editor and current president/CEO of Entertbrain, Hirokazu Hamamura...

- expects Dragon Quest XI to sell over 5 million units in Japan

- expects the game to outsell both Pokémon Sun & Moon and Final Fantasy XV

- says Dragon Quest XI could possibly sell even more than what he expects

- the eventual release of the Switch version, combined with the influx of smartphone players will help the game hit 5 million

- believes there will be people who buy both PS4 and 3DS versions