What about a side game? or something, or maybe a permanent gamemode (void)

Looking at Void, it is so... creepy, mysterious, intimidating. Maybe make a horror side game where you play as Kai'Sa, or some other random person walking through the void. It could turn out a lot like Scorn or Agony. Either that or a first person single player or multiplayer game mode inside of the void. idk iv'e been looking for a cool horror game for a while now, and the void looks like it would make a really good setting in a horror game.

Or you could also make a gamemode where it's like the star guardian one, but it's void and stuff.