When I hear "Meta" and "Horror-Adjacent" IP, I'll admit the main thing that's coming to mind for me is what if it's a film, with a director that both Uni and HHN has worked with before, and the film they previously did with Uni (and use for HHN) featured a particular property of the original IP which the director is now working on. It's definitely "Horror-Adjacent", and due to what I just said, very Meta due to its history.
Just some food for thought.