The purpose of this seems to be to clear the chaff out of the DCU, to bring continuity into line and to reset the Big Three. Somehow, this all swings on Connor Kent and Dick Grayson, the only two heroes available to fight Luthor-3 and Superboy-Prime.Confused? Don't be scared, you're not alone. As if he wasn't busy enough, Alexander has also taken control of Brother Eye and the OMAC's and caused the Spectre to declare war on magic, killing off many of the magical characters from the DCU. Alexander Luthor has also shifted the center of the universe from Oa, causing some sort of space storm that Donna Tory, Animal Man and other heroes go to fight. Alexander Luthor's goal is to create a 'Perfect' world, while Superboy-Prime, whiny little bitch that he is, seems only to want to pick fights with other Super(men). This machine is powered by the various heroes of those Earths, who are incorporated into the tower. Alexander, using a machine that utilizes the remains of the Anti-monitor, creates a machine that will re-separate the multiple Earths that were merged into Earth 1 in Crisis on Infinite Earths. Alexander Luthor had long before replaced Earth-1's Luthor with a hologram, and created the Villian's Society to bring the Earth-1 villains under his control. Long chafing against their exile, the two manipulate Superman-2 into seeing the heroes of Earth as incontrovertibly tainted, and convince him to break loose from their 'haven'. Alexander Luthor and Superboy-Prime, who along with Earth-2 Superman and Lois Lane, survived the original Crisis on Infinite Earths have been living in a type of limbo, separate from the time line of Earth-1.

Infinite Crisis by Geoff Johns