There are those in the industry who track these kinds of things who believe that DC Comics has been making significant changes to the Superman character over the years in a continuing effort to thwart claims by the estates of Jerry Siegel and Joe Shuster about the character.
A good place to start with this story is at Comics Beat.
With DC’s newest relaunch/reboot/do-over of their universe this fall, they are making more changes to Superman, and it's not just his costume or his fresh L'il Abner look. A lot of the changes won't be clear until you actually read Action Comics #1, on sale September 7. I've read that first issue, and here are the Top Ten changes to Superman's mythology.
10. Able to leap Kim Kardashian’s butt in a single bound.
9. Fights for truth, justice and the Military/Industrial Complex’s way.
8. Bottle City of Kandahar.
7. Planet Krypton replaced by Planet Molybdenum
6. Krypto’s a rescue dog from Michael Vick’s backyard.
5. Ma Kent now a Thai ladyboy (It is a Grant Morrison story, after all)
4. Superman’s New Dominionist Villain: Lex Lutheran
3. Jimmy Olsen is big brother to Mary-Kate and Ashley
2. Lois Lane + Lana Lang = Lesbian Lovers
And the #1 change in the new Superman reboot:
1. Goodbye Yellow Sun - Superman now gets his powers from Big Oil
Not giving a shit about Superman since I was 10, I wonder how much of this is tongue-in-cheek and how much is real? We already know that #10 is kind of true since he can't fly, just jump really far. I wouldn't be surprised if #'s 9, 2, and 1 are true but the rest just sounds ridiculous.