Ion is the chosen one of the Green Lantern Corps, whose coming was foretold as a prophecy in the Book of Oa. But now that Kyle Rayner has been possessed by Parallax, can he ever bear the mantle of Ion again? Or will it pass to a completely new bearer? This all-important Sinestro Corps War tie-in reveals the answers, and sets the stage for Green Lantern — and Kyle Rayner — for years to come!