As we were recently reminded, Compile Heart is never not busy. They have a bunch of games in the works, and one of them is being teased on a newly-launched website. Though there's no timer building up to its reveal, Compile Heart's current tease centers on a new "cute RPG."
Potentially making things more interesting is the "illustration of a never before seen collaboration RPG" that accompanies it. It's currently not quite clear whether the illustration itself or the whole game is a collaboration, though, so we'll have to wait for more information.
That info shouldn't be too far behind, at least. The latest Compile Heart New Title Presentation will be held March 10 at Dengeki Game Fes 2018, where the previously-leaked Mary Skelter 2 is expected to be formally revealed. Whether it's related or not, we might find out more about this one, too.