The Injustice Syndicate is a team of villains from an unnamed reality (similar to Earth-Three), where the morality of its people are reversed (heroes are villains and villains are heroes).
The syndicate battled Red Hood's team of heroes, but they were defeated and Red Hood was forced to escape. They later caught him, unaware that he had allied himself with Batman.
After a fight between Owlman and Batman in with Batman end victorious he took Owlman costume, traveled to the other universe and freed the Parallel Earth Heroes and trapped most of the Injustice Syndicate.
Before being defeated Silver Cyclone tried to set off a bomb to destroy all organic tissues in his world, only to be stopped by Red Hood.
- Silver Cyclone
- Blue Bowman
- Scarlet Scarab
- Rubber Man
- Parallel Earth B'Wana Beast (appears only in flashback)
- Parallel Earth Wildcat (appears only in flashback)