When an Alien Alliance stages a worldwide invasion, Captain Comet must rally the troops to defend the Earth! With Australia surrounded by an energy cage, the United Kingdom completely missing, and alien troops invading all over the world, the Rehab Squad and their allies have their work cut out for them, especially when the Justice League is busy dealing with a threat of their own! Meanwhile, can a powerful old enemy of Supergirl turn over a new leaf as a heroine all on her own? And is anyone powerful enough to stop the inhuman killing machine called Doomsday? Introducing Valor, and guest starring the New Titans, the Outsiders, the Global Guardians, the Green Lantern Corps, the Secret Six, and many others!