User blog comment:MS225/Arrow's Alliances in the Finale/@comment-27700324-20170412023423

Maybe while this battle is happening, flashback Oliver is having a sort of Castaway moment on the island as he is preparing his skills and surviving on it. Then at the end he finds the boat and shoots the arrow that lights the signal for the boat to see. We zoom in on the arrow as Oliver fires it and it turns into the one in the main intro sequence.