There are four issues I know off and I´ve heard that there exists a fifth one.
One features a semi-olympic game in Savage Land, one features Madripoor, one an alien planet I think...and I forgot what the other was about

Part of me mourns that DC never had the sense of humor to do a blatant Sport-Illustrated-Swimsuit-Issue-style cheesecake issue of their own. Can you imagine the awesome?
Hell Yeah! That would have been droolworthy^^