VIDEO : Deathstroke's Son May Be Appearing In Arrow Season 6

A new casting announcement may drop some hints that one of Deathstroke's sons will appear in Arrow season 6. According to TV Line, Arrow is adding a character that would seem to have ties to Oliver?s greatest frenemy, as the CW looks to cast an Australian teenager for the upcoming season. In the comics, Slade was two sons, Grant, who appeared in the future version of Star City in season 1 of Legends of Tomorrow, and Joe, who has yet to appear in any of the CW's DC shows. Arrow season 6 premieres Thursday October 12 at 9pm on The CW.