Overlord: Ple Ple Pleiades - Nazarick's Greatest Crisis
An isekai series that explores the genre's tropes with its own unique spin.
Bundled with novel series' 11th volume. The new anime will feature the appearance of the Pleiades combat maids, as well as the rest of the Floor Guardians. (Source: ANN)
Plot summary from MyAnimeList. Data and images via Jikan API.