The latest issue of CoroCoro Comic has new information on Yo-kai Watch 4.

Here are the tidbits:

More Than One Protagonist – Players can freely control Natsume, Keita, and Shin, the protagonists of the three worlds. Additionally, other characters that appear in the Shadowside anime are also playable.

– Players can freely control Natsume, Keita, and Shin, the protagonists of the three worlds. Additionally, other characters that appear in the Shadowside anime are also playable. Battle System Evolved: Humans Join In – The battle system of Yo-kai Watch 4 is completely different from previous games. Human characters like Keita and Natsume will participate and work together with their yo-kai companions.

– The battle system of Yo-kai Watch 4 is completely different from previous games. Human characters like Keita and Natsume will participate and work together with their yo-kai companions. A Fourth World – There is one more world outside of the three worlds that make up the setting of this adventure. A “fourth world” only in Yo-kai Watch 4 also seems to exist. The key to opening the door to this fourth world may be the Yo-kai Ark.

Yo-kai Watch 4 is due out for Switch this winter in Japan.

Thanks, @ddsxtggg.