All Star Adventure Comic #70

In "Race to Save the Universe," Superman and The Flash are thrust into a high-stakes showdown when the Anachronids once again disrupt their race—only this time, the chaos leads them straight into the clutches of Phantom Zone criminals. With the villains revealing their shocking role in creating the Anachronids to tear down the barrier between dimensions, the heroes must race against time to stop a threat that could unravel reality itself.