Deathstroke the Terminator... That was a suprise. I know the Teen Titans villian is populaur inside their series, but outside? I am a TT fan so I am glad to see him for a change, but it is a suprise, really it is. I was expecting one of the other villians.
Edit:
Now we've filled out the spots a lot more, didn't someone early on say Robin and Powergirl would be in it? I can see why Deathstroke would be in if Robin was in since Robin is a Teen Titan. But if Robin's the last spot then Powergirl is out. Unless they really do plan more characters for each side (a lot of people say 10 per side was too little).
Edit:
http://i53.photobucket.com/albums/g69/lost_angelwings/comics/pgwindow1.jpg
or
http://z.about.com/d/comicbooks/1/0/S/K/2006_04-dc080.jpg
Edit:
Also if Deathstrokes in, the Titans Tower might be a stage:
http://upload.wikimedia.org/wikipedia/en/3/3d/Titans_tower.jpg
Edit:
Anyone intereasted in the characters in that last pic: The blonde I think is Wondergirl (or maybe Speedy, I don't have the issue with that pic in). The girl is Starfire. (You don't need to know much about either, but Starfires race are care-free and wouldn't think nothing of it if they walked around naked. Then again would you find a oranged skinned space-barbarian with green glowing eyes attractive?).