History: (DC Comics Presents #1, 2) - Billions of years ago an alien race colonized Earth, but after a civil war the Zelkot faction left and colonized Krypton. In departing the exhaust from their organic ships left behind the first unicellular life on Earth. Over geologic time the factions evolved into two separate species, and the Volkir, led by Islayn, were adamant about preserving the war, though they no longer knew the cause, while Aylem and the Zelkot were set on ending it by sending representative Iylar to Earth to travel into the future, pierce the Cosmic-Curtain time barrier, and return to Earth’s past to stop the cause of the civil war. Islayn and Aylar called a cease-fire to capture Superman and Flash in Q-Energy and dense energy cages, because they knew the heroes were capable of interfering and wanted no outsiders affecting their plans, but the heroes did indeed escape their cages and take out the leaders. The Zelkot crew threatened to destroy Earth if Flash didn’t help Iylar achieve his goal, so he ran into the future. The Volkir revealed that after the civil war they colonized Krypton and stabilized its internal pressure, so if Iylar succeeded in preventing the races split, Krypton would have exploded millions of years earlier and Superman would not exist. They sent him after Flash to stop him, and he found Flash stuck in the 25^th Century where his rival Professor Zoom was running a circle around the speedster trying to disperse his molecules, so he helped his ally defeat and imprisoned Zoom. The heroes couldn’t let the Zelkot destroy Earth, but if the civil war was prevented, not only would Krypton have perished, but they would never have left Earth and left behind exhaust from their organic ships that left behind the first unicellular life on Earth. Superman got stuck in the 30^th century, but got unstuck and destroyed the communicator that allowed the aliens to monitor him by forcing a head-on collision with Superboy, his past self that was visiting the Legion of Super-Heroes, and Flash’s communicator was lost battling a savage turtle tribe in the far-flung future. Free from monitoring the heroes passed the Cosmic-Curtain, knocked out Iylar and returned to the present day. They defeated the Zelkot and Volkir and flung them into another star-system to continue their battle where Earth would be unaffected.