I just watched the new advertisement for Arrow, Season Two. I really like the show a lot and so I watched this preview. The last 10-15 are the most important. NCSoft doesn't know what is going on if they don't pick up this hint.
http://tv.msn.com/paralleluniverse/2013-comic-con/new-villains-coming-to-arrow/story/
Scooped below.
http://www.cohtitan.com/forum/index.php/topic,8809.0.html