In Superman's normal timeline, a being similar to Brainiac 12 emerged, but was known as Brainiac 13. Brainiac 13 was responsible for giving the entire city of Metropolis a widespread technological upgrade (commonly referred to as the B-13 Conversion), transforming it into a literal "City of Tomorrow". Like in the case of Brainiac 12, Superman fought against Brainiac 13 and trapped him within a slice of time along with the intergalactic conqueror Imperiex.

In an alternate future timeline, Lex Luthor and a group of mysterious scientists known only as the Futuresmiths created an upgraded version of the original Brainiac. A twelfth generation model, this being became known as Brainiac 12. Superman of the mainstream timeline arrived in this era to battle with Brainiac 12 and managed to trap him within a fold in time. A native of this era, Cir-El, sacrificed her own life insuring that this future timeline never comes to pass. As such, Brainiac 12 never truly existed.




Superman Villain(s)
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This character is or was primarily an enemy of Superman in any of his various incarnations, or members of the Superman Family. This template will categorize articles that include it into the "Superman Villains category."

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