Tomorrow's Legends

The League are running security for a peace summit when an alien ship shows up in the sky above. Followed soon after by a Thanagarian warship! It seems that Hawkgirl was a double agent sent to Earth to scout things out, where she relayed intel back to Thanigar that Earth's defenses are no match for the Gordanians, a lizard like race apparently hell bent on conquering the universe!  The Thanagar's leader, Hro Talek, offers to help by recommending they build a shield around the Earth. The people and the League work with the Thanagarians in a massive effort to construct the shield generator, but things are not as they seem. Batman discovers the Gordanians were dead long before they came to earth and it turns out that Hawkgirl is betrothed to Hro Talak,  and he is there on a revenge mission. He wants to build a Hyperspace Bypass to get to the Gordanian home world and end the war. The trouble is, that the bypass will destroy Earth in the process. To their surprise, the League is countered with weapons built around