Premieres April 14th in Japanese theaters. The new PV is here. This is the second in the ongoing trilogy of Mononoke movies. Check out the Crunchyroll article for additional information. The movies are continuations from a 2007 show. The synopsis for the show from AniList:

Mononoke is a spin-off of the Bakeneko story arc of Ayakashi: Japanese Classic Horror. It follows the Medicine Seller as he deals with various spirits or "Mononoke" in feudal Japan. Just like in the Bakeneko story, he combats with a series of tools and his vast knowledge of the supernatural on his side, but can only slay the Mononoke when he uncovers its form (Katachi), the truth behind its appearance (Makoto) and the reason for its unusual behavior (Kotowari).