The Outsiders are one of the hero teams in Batman: The Brave and the Bold.
The albino outcast Slug gathered homeless people, run aways, and juvenile delinquents. He then formed an underground society he called the Outsiders. After lecturing and brainwashing them on what he perceived as the corruption and downfall of society, Slug sent the Outsiders to the surface and attack various public installations. Black Lightning, Katana, and Metamorpho were his three top agents of destruction. After Batman chased them for a week's time, he and Wildcat finally found the secret headquarters and convinced them to turn against their leader Slug. Lightning, Katana, and Metamorpho trained extensively under Batman and Wildcat. During their training, the trio was kidnapped by Psycho Pirate but luckily Batman guided them to confront their nightmares and break free. However, they were soon part of the heroes placed under the control of Starro.
Afterwards, the Outsiders expanded with the addition of Geo-Force and Halo to the team. It appears their first official mission was to help stop Kobra from unleashing Kali Yuga on the planet. They were a formidable force but their ability to anticipate future threats still needed some work.