Ever since Roy Harper first appeared in season one, fans have been wondering when he would suit up as Arsenal. Well, thanks to the trailer, it looks like they might not have to wait to long to see Arrow's sidekick fully accept his role as a hero and don the red suit. Harper's journey has been almost as much of an origin story as Oliver Queen's. We have seen him go from low-life criminal to an upstanding citizen to a man willing to risk his own life to save a busload of people in danger. His time under the influence of mirakuru will definitely have lasting repercussions, but he will be better equipped to handle the situation, both literally and figuratively, as a member of Team Arrow.