In Arrow's series finale, John Diggle stumbled across a box that had crashed to Earth. After opening it, he was greeted by a green glow, with the clear insinuation that this was a Green Lantern Power ...

The following contains spoilers from the June 15 episode of The Flash, but really also for the Arrowverse in general. "Oh, Johnnnnn..... You can come out now." Midway ...