I'd like to lure more people into participating in the AU Exchange, for alternate universes! Both canon divergence (what if Lobelia Baggins got the One Ring?) and actual alternate universes (what if Little House on the Prairie was a space opera?)

You can select from available fandoms and types of alternate universes here in the tagset - the types of alternate universes are under "freeforms," sorted by ones specific to certain fandoms and ones that can be applied to any, labeled "ALL." So, for instance, you select "Narnia" as your fandom, "Eustace Scrubb & Jill Pole" as your characters, and "ALL: Creepy/Dark Circus" as your AU. And so forth.

Here are a few of my favorite alternate universe tags which you can request someone to write for you, or offer to write yourself:

Star Wars Sequel Trilogy: Everything is the same except Kylo Ren is a chicken

Star Wars The Last Unicorn: The Last Unicorn is set and true in Star Wars

X-Men Comics: Xavier's Mansion Haunted By All The Dead Team Members

ALL: Heian Japan AU

ALL: Travelers on the Silk Road AU

ALL: Hyperspace test pilot AU

ALL: Female characters are the major players

ALL: Humans Soulbonding To Animals Is Common But Looked Down Upon

ALL: One Character Is A Demon That The Other Character(s) Summoned

ALL: Soulmate or 1000 Roaches AU (Context.)

I'm still working on my letter but in the meantime you can look at this one for an example of how it all might work. Contains huge spoilers for all listed fandoms, but if you click you'll see them all under a cut so you can just look at the ones you want to see.