Source: Superman #349 (1980) and Man of Steel (2013) Type: Magical creation and Film
If you think "Jenny Olsen" first appeared in the Man of Steel movie, think again. In actual fact, the first appearance of gender-bender Jimmy is in Superman #349, in which Mr. Mxyzptlk creates a world where everyone is the other gender, including Penny White, Louis Lane, Clara Kent and, that's right, Jenny Olsen. It would one day become a popular Elseworlds, and then one of the the Multiverse's 52 Earths. More or less.
So when they announced Rebecca Buller as a female replacement for Jimmy Olsen, I wasn't shocked, and I certainly wasn't upset. There's no reason for other media to stick closely to the print material except in spirit, and in the interest of diversity, I'm quite happy to see a Jimmy that's a Jenny (or who is black, as in the announced Supergirl series). No problem at all. But did the movie makers get skittish when the fans got a hold of this information before the film was out? I ask because she's never referred to as "Olsen" on screen. She's just Jenny. Well, here's to Man of Steel II: The Dark Knight Returns actually making it official.
I mean, gender-bending isn't likely to be the film's greatest fan-sin, is it?