Justice League - Offworld
Led by Wonder Woman, this group of superheroes is functionally a separate team despite officially being made up of Justice League members. Traveling into deep space following a psychic attack that caused several of their members to become mind-controlled into attacking the planet Rimbor, these heroes work to repair the reputation of the Justice League by fighting crime on an intergalactic scale.
- Wonder Woman (Princess Diana of Themyscira) - Sent to Man's World as an ambassador for the Amazon people, Wonder Woman has now become an ambassador for all of the Earth.
- Superman (Clark Kent) - Sent to Earth as the last survivor of his doomed planet, Kal-El of Krypton was raised as ordinary farm boy Clark Kent. His body enhanced by Earth's yellow sun, he fights a never-ending battle against evil as Superman.
- Martian Manhunter (J'onn J'onzz) -A police detective on his native Mars, J'onn J'onzz uses his powers of telepathy and shape-shifting to fight crime on his adopted homeworld of Earth.
- Green Lantern (John Stewart) - A member of the US Marine Corps and an architect, John Stewart was the second Earther chosen to act as Hal Jordan's partner and the second Green Lantern to join the Justice League. Thus far, he is the only Green Lantern to have been seen on-screen in Young Justice: Outsiders.
- Adam Strange - Once a scientific adviser to the Justice League, Adam has become a full member of the team and defender of the planet Rann.
- Ice (Tora Olafsdotter) - The princess of a secluded magical realm only accessible from Norway, Tora Olafsdotter has the power to lower temperatures and freeze objects around her. She was recruited into the Justice League sometime between season 2 and season 3.
It is presumed that the other Green Lanterns of Earth - Hal Jordan and Guy Gardener - are part of this team. This is due to a reference Vandal Savage made in episode 7, about the Green Lantern Corps being occupied with fighting both The Reach and the New Gods of Apokolips. Captain Atom, Hawkman, Hawkwoman, Icon and The Atom are also presumably part of this team, due to their absence at the meeting of all the Justice League members on Earth in the season premiere.
Mockingly referred to as "Batman Inc." by Black Lightning, when Batman tried to recruit him after he quit the Justice League for different reasons, it has been confirmed that Batman has begun leading a new team of heroes in the wake of his public resignation from the Justice League. The exact membership has yet to be confirmed, but it is presumed that the rest of the Justice League members who resigned along with Batman are part of this group.
- Batman (Bruce Wayne) - Orphaned at a young age, Bruce Wayne trained his mind and body to the peak of human perfection, devoting his life and his fortune to waging a war on crime in all its forms as Batman.
- Green Arrow (Oliver Queen) - A former member of the wealthy elite, a shipwreck forced billionaire Oliver Queen to struggle for the first time in his life. Discovering a natural talent for archery, he became a modern day Robin Hood upon his return to civilization, targeting those criminals who hid behind a respectable mask of authority.
- Plastic Man (Patrick "Eel" O'Brian) - A petty crook who was abandoned by his gang during a chemical factory robbery, Eel O'Brian turned over a new leaf after he discovered that he had developed the power to reshape his body into anything. Now he tries to make amends for his criminal past as Plastic Man.
- Katana (Tatsu Yamashiro) - Wielder of the magical Soultaker Sword, she joined the Justice League at some point between season 2 and season 3.
- Hardware (Curt Metcalf) - A brilliant engineer whose work was corrupted by his legally untouchable employer, Curt Metcalf created an armored suit and advanced technology to become the vigilante Hardware and bring down the criminal syndicate his boss ran in secret.
- Batwoman (Kate Kane) - Cousin of Bruce Wayne, this former soldier became a vigilante on her own terms, unknowingly getting into the family's secret business as Batwoman.
- Metamorpho (Rex Mason) - Transformed by the mystic Orb of Ra, adventurer Rex Mason now has the ability to change his body into a number of elemental compounds and substances. While he has not appeared on the show yet, he was seen standing next to Batman in one of the early trailers and was featured on the first poster for Young Justice: Outsiders.