Mary Marvel went back to evil for...some reason...last time I bothered reading JSA, with Isis in charge of the Rock of ETernity.
I have a theory that they keep turning her evil because it's an homage to Alan Moore. I just reread Miracleman the other day and found Moore's backhistory on the character. He claims that Kid Miracleman was the counterpart of Mary Marvel. And Moore meta is the tail that wags the dog. :(