WE ARE YESTERDAY PART 3! The secret origin of the single most unholy union in DCU history is at last revealed! The Legion of Doom has set in motion a scheme to lay waste to not only the World's Finest Team--but to the present-day Justice League Unlimited! How is this possible? All will be revealed in this special World's Finest Annual by Mark Waid, Christopher Cantwell, and Dan McDaid! Plus: Meet John Stewart, the newest ring-slinger of sector 2814, in this definitive World's Finest telling of John Stewart's Lantern origins!