Starring heroes from Crisis on Infinite Earths! Superman and Supergirl's journey through the Phantom Zone takes a tragic turn as one of the most devastating moments in DC's history is revealed! Supergirl could save herself - but only if she sacrifices Metropolis to the marauding intelligent apes from Kamandi's world! This extra-sized issue features a bonus Martian Manhunter story written by Rob Willams and illustrated by Eddy Barrows and Eber Ferreira.