LOL .... am I the only one who thinks that it's stupid to be worried about Superman and Wonder Woman ? I mean what's the worst they can do, cause a mini earthquake ? I think Geoff John's is just running out of ideas, how about we give Grant Morrison the Justice League title he actually had exciting stories that had the heroes fighting the villians instead of fighting themeselves. If Geoff John's what's to write about heroes fighting each other I suggest writing for Marvel.
If you read the issue it explains why... Its not that hes afraid their sex will tear the earth apart. Its about how people of earth will see two of the most powerful people in the world as a couple.