Titled Isekai Quartet, the anime will consist of deformed characters from these four anime series: Overlord, Kono Subarashii Sekai ni Shukufuku wo!, Re:Zero kara Hajimeru Isekai Seikatsu, and Youjo Senki, and is slated for next spring.
An official website for a mini crossover anime has been launched.
There’s also other characters from other alternative worlds gathered together…