The eight JSAers sent into hyperspace are finally reunited and make their way back to Earth-2. At the same time, the All-Star Squadron helps Mekanique, a robot from the future, succeed in her attempt to change history. In order to facilitate her mission, Mekanique has used her power to prevent the effects of the Crisis on Infinite Earths from finalizing in 1942; her task complete, she allows the history altering effects of the Crisis to take hold, effectively eradicating from the All-Stars' memories the existence of Superman, Batman, Robin, Wonder Woman and Aquaman.
The conclusion of both the "Shanghaied Into Hyperspace!" storyline and the Mekanique storyline.
Not bannered as a Crisis on Infinite Earths Crossover.