He might be Superman's most well-known enemy in the DCEU, but General Zod may not exactly be the bad guy Kal-El thinks he is. As the Man of Steel discovered, the reasons behind Zod's imprisonment in the Phantom Zone could actually make him a hero.
While Superman is often referred to as the «Last Son of Krypton,» he was far from the only Kryptonian to survive the planet's destruction. Aside from Supergirl and the millions of Kryptonians in the Bottle City of Kandor, a few of the Krypton's worst criminals survive thanks to the mysterious prison, the Phantom Zone. The interdimensional void was used as a punishment for those the Kryptonian Council deemed as malcontents. The Phantom Zone's most notable resident is Superman's recurring enemy and ally of Jor-El, General Dru-Zod, who was sentenced to exile along with his co-conspirators, Non and Ursa.
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While Superman has repeatedly come into conflict with Zod, Kal-El discovered that not every Kryptonian feels the same way about the general. After the Bottle City of Kandor was resurrected and established a new planet known as New Krypton, Superman’s aunt Alura Zor-El freed the Zod along with Non and Ursa. In Action Comics #874 by James Robinson and Pablo Raimondi, Superman discovers what his aunt has done and vehemently objects to the leniency Zod has been shown. Alura, on the other hand, makes the case that Zod's initial banishment to the Phantom Zone was unearned. Alura, Zod, and his allies all tell Clark that the attack that got Zod cast out of Krypton was a result of their refusal to listen to the Jor El's discoveries about Krypton's impending destruction. Alura sums it up by saying that if things had gone down
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