If you’re an Arsenal fan, or if you read and loved the literary works of Nick Hornby, Highbury stadium looms large in your heart. Football clubs leave a lot in their wake. The singing and the shouting from so many cup ties and European nights lingers on adjacent sidewalks, drawing fans and passers-by in to retrace steps that may or may not have been theirs on some half-remembered day in the past. Arsenal have a new home, with great sightlines and plenty of brand activation, but the ghosts of Highbury linger.