According to the Silver Surfer, the Alpha/Omega was the name of the object which contained all potential matter and energy before the Big Bang. When it collided with Galactus' Incubator, Alpha/Omega split in two items, the Alphex and the Omegron, which were sent hurtling to the opposite ends of Eternity. However, ever since then they had been heading back toward each other. And if the Alphex and Omegron were to ever rejoin, the entire universe would fold back inside itself.[1]
