Arrow may have a new villain by the end of the Season 3 finale.
It’s said the new villain’s “reign of terror” will continue into Season 4.
According to the report, the mystery character is being referred to as “Damian Dark.”
Note: Some outlets have mistakenly speculated it to be the son of Bruce Wayne, Damien Wayne, but I doubt a ten year old is going to be an opponent on the show for Arrow.
There is a character in the DC Comics with the name Damian Darkh, who is a 20-ish underworld figure who has access to advanced technology and often scraps with the Teen Titans.
Here is the description of the character from wiki:
Baby-faced Damien Darhk was a mysterious, elusive, and dangerous figure. He claimed to be a major player in America’s underworld and certainly had some connection to the criminal organization H.I.V.E. He also seemed to have had access to unique high-tech equipment that has never been used by any known organization. Darhk was considered to be a major criminal by the C.I.A. and F.B.I.; however, their investigations revealed no hard evidence against him. He was a wi-fi fiend, staying in touch with associates by the very latest forms of mass communication. What particularly baffled investigators was his apparent youth; Damien seemed to be in his early twenties yet was already well-established and well-connected.