Tonight’s Random Game Concept that sprang up in my head:
(Old) World of Darkness game, cross-genre. Let the players make any kind of PCs they like — Kindred, mages, changelings, mummies, whatever, and you play a short prologue.
Then the barriers get torn down. All of them. The walls between this world and the Umbra, Shadowlands, Dreaming, Yin and Yang Worlds, all the rest of it.
And you run the rest of the chronicle as a post-apocalyptic Exalted game.
It’s a new Mythic Age, not the one from the Exalted books. You’re throwing out all the setting information, so you don’t have to worry about why your ex-mummy Solar Exalted is cooperating with an ex-mage Sidereal, etc. You get all the fun of apocalyptic world destruction, with GIANT MAGIC POWERS, a legitimate reason why the PCs might be able to really reshape all of reality. It would be EPIC BEYOND WORDS.
. . . I think I want to run this.