JLA/Titans The Technis Imperative

When a large number of former members of the Teen Titans suddenly disappear, the Justice League and the Titans each begin investigations into the whereabouts of the missing heroes. But as the Titans realize that a former teammate is involved in the disappearances, they find themselves squaring off against the World's Greatest Heroes in order to protect their old friend. Featuring Superman, Flash, and Green Lantern, this book presents epic battles between mentors and protégés as Batman, Aquaman, and Wonder Woman each take up arms against their former sidekicks.