Based on the quote I pasted, he seems to mean the ones with Doctor in their name: "Yes! I love the classic rogues gallery, especially the ones with Doctor in the name! Yes we will use some of them!"
Circe, Cheetah, Grail and Ares seem to be the ones who will be the most interested in the Sphere of Gods, so those seem to be the most likely candidates.
They said they're introducing new characters, and I'm assuming new villains, in this story arc. I'm assuming if it is one of these villains are in this arc, they won't be the main villain of the story. They'll probably be hinted at or introduced at the end to build up on the next story arc.
So Bleeding Cool published some rumors saying that with Diana "dead" the Amazons will be competing to pick a successor to the Wonder Woman mantle. With Hippolyta appearing in JL I assume she would be taking up the name Wonder Woman but perhaps not? Wonder if we'll see that play out in this book.
Currently(or soon to be) Reading: Alan Scott: Green Lantern, Batman/Superman: World's Finest, Fire & Ice: Welcome to Smallville, Green Arrow, Green Lantern, Jay Garrick: The Flash, Justice Society of America, Power Girl, Superman, Shazam, Titans, Wesley Dodds: Sandman, Wonder Woman, & World's Finest: Teen Titans.
Why would the Amazons compete to be the new Wonder Woman? The only relevance Wonder Woman has to them is that it's Diana, unless they feel they need a new Champion in Man's World but that just sounds weird now that it's not a self-sacrificing act anymore.
Possible spoiler leaks for Wonder Woman from Vordan's thread in the main DC Forum
spoilers:end of spoilers
Amazons are fighting over who gets to be the new Wonder Woman, Hippolyta gives them a test. Nubia wins, Hippolyta gives her the crown and makes her queen before leaving to be the new Wonder Woman herself.
Hippolyta somehow knows Yara by name, Diana has never heard of her.
Yara left Brazil when she was a child too young to remember it, she was raised by her (deaf) aunt and (white) uncle in Idaho. As an adult she's traveling back to Brazil for the first time.
end of spoilers
So sounds like Hippolyta and Nubia both have a claim to the title at the moment.