After yesterday's explosive Season 2 finale it has been announced that the Dark Archer himself John Barrowman has been promoted to series regular in Season 3 this Fall:
#Arrow has a new series regular. @Team_Barrowman -- What could go wrong?!?! pic.twitter.com/VgFQdQhKNq
— Stephen Amell (@amellywood) May 15, 2014
Well, in the comics Roy Harper (aka Red Arrow/Arsenal) has a romantic relationship and eventually a child with the evil villainess Cheshire. Cheshire is actually a member of the League of Assassins as well as having the assassin Sportsmaster as her father. In the Arrow-verse it seems they are setting up to have Thea Queen "turn to the dark side" and be trained under Malcolm Merlyn in the ways of the League. She could come back to reek havoc on Roy Harper and the entire Arrow team.Of course this all pure speculation....
Arrow returns this Fall on The CW