Mirror Universe

There are some comics and TV shows that have  antimatter or Mirror Universes whatever you wanna call them. 

List items

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  1. Crime Syndicate of America
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  2. Mirror Universe
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  3. Suppression Squad
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  4. Superguardians (part 1 of 2)
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  5. Superguardians (part 2 of 2)
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  6. Down the Rabbit Hole
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  7. Justice League Crisis on Two Earths