Warriors Orochi 4 releases in Japan on September 27, 2018 for PlayStation 4, Nintendo Switch, and a PC release on October 16.
Warriors Orochi 4 has a new “Divine Action” system that features elements that let heroes go into “Deification Mode,” which basically allows them to wield the power of gods.
Last we heard, Koei Tecmo was considering a two-player local multiplayer with Joy-Cons on Switch, but it has now been confirmed for the game.