*sigh*
Here is what we know from Rookie about the IP:
- The IP is popular with the general public and horror-adjacent. That pretty much knocks out “cult classic” and anime. This is something that Universal believes is a big enough IP that can headline despite not being obvious horror.
- It’s not a music artist or musical act.
- The HHN fandom will likely respond to the IP by vocally saying it doesn’t belong in a similar way they reacted to Eilish.
I’m also confident, based on stuff I’ve been told from others, that the IP is a TV show and/or movie. While that doesn’t eliminate all video games, it does eliminate most of them (and the popular enough to occur despite not being “horror” will likely eliminate most other video game options).
Assuming we can take all of these clues at face value, there’s actually not as many options as it would appear at first glance. Of those options, we can likely start taking some off the table to actually narrow things down.