Yeah, AU's are all over the map. Some are so alternate it's hard to get the connection. Others just take one thing and change it. My secondary fandom is Star Wars TPM and AU where Qui-Gon didn't die is so common in that fandom that his death is known as The Scene That Didn't Happen.

I write X-Men movieverse, mostly post-X1 (although I've written X2 as well - can't stand X3). Some would consider that AU, since it contradicts X2, but I just consider it true to X1 canon.

Thanks for the card!