Young's character is said to be a potential love interest for Thea Queen, played by Willa Holland. Wesley is part of a multi-episode arc. There have been recent announcements already of the cast bulging with new faces for the next season of Arrow.
It seems Oliver Queen (Stephen Amell) doesn't get to enjoy his 'new life' outside Starling City after all as crime sleeps for no playboy vigilante billionaire. Arrow returns with Season 4 this October 7th on The CW.