Initially, the Underground experienced some temporary victories in their battles with the Crime Syndicate of Amerika, both as a team and individually. For example, Quizmaster's underground connections allowed him to interfere with the supplies needed by the Crime Syndicate for various operations, such as the speed serum that Johnny Quick requires to maintain his super-speed.
Eventually one by one the Justice Underground members were all defeated, captured or killed. For example, Ultraman rendered Sir Grundy inert on a Saturday, and Lady Sonar sustained massive injuries from having her sonic abilities reflected back to her by Power Ring. Lady Sonar was forced to replace much of her shattered body with bionic implants. It was in this form that she resided as the guardian of Modora, the final free nation of Antimatter Earth.
Upon the Syndicates invasion of Modora, Lady Sonar was successful in defeating Johnny Quick by temporarily shifting his body out of phase with reality. She was eventually destroyed by Owlman and the rest of the Crime Syndicate when they finally conquered Modora. She was placed into cryogenic storage alongside her teammates, ready to be reanimated in a zombified state if the Syndicate decides it necessary. Their remains are located in the Crime Syndicate's Panopticon on the Moon's surface.
The Justice Underground was released by J'onn J'onzz as a team of associate JLA members reversed back into the Matter Universe. It is unclear how they were able to recover from their injuries, though it could be inferred that Owlman healed their injuries while they were in stasis.
- 2 Appearances of Justice Underground (Antimatter Universe)
- 4 Images that include Justice Underground (Antimatter Universe)
- Team Gallery: Justice Underground (Antimatter Universe)
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