In space, the Red Lantern Corps have allied themselves with Starro the Conqueror, and it will take every member of the Green Lantern Corps, and then some, to turn back their assault on Oa. Can Hal Jordan find redemptions for what he did as Superman's ally? And more importantly... what happens when Lobo gets a Green Lantern ring? Back on Earth, the war between Batman and Ra's al Ghul reaches a fragile peace, but a new threat from the stars has set its sights on Earth. When Brainiac and Gorilla Grodd begin their fateful partnership, it means the end of Ra's al Ghul's regime and the beginning of Batman's greatest battle ever.