Justice League Members
Superman
Superman is the last Kryptonian. He was sent to Earth by his parents prior to the destruction of their home planet, Krypton. The Kents adopted the young Kryptonian, naming him "Clark". Clark began to discover his powers while growing up in Smallville. Clark moved to Metropolis and found employment as a reporter for the Daily Planet. After responding to the Imperium invasion, Superman joined with other heroes to form the Justice League.
Batman
Batman witnessed his parents brutally gunned down in a random mugging. He made a solemn vow at their grave that he would commit his life towards bringing wrongdoers to justice. A few nights later, Bruce Wayne was in his father's study when a bat crashed through the study window. Inspired by this incident, Bruce garb himself in the visage of a bat and became the Batman. Bruce became one of the founding members of the Justice League, teaming up with six other powerful heroes to deal with an alien threat that had devastated the people of Mars, and was now threatening Earth.
Flash
The Flash is known as the Fastest Man Alive. He was the subject of a freak accident in which lightning struck a rack of chemicals in a laboratory. Somehow this combination endowed Wally with the fantastic speed powers. Adopting the costumed identity of the Flash, he fought to protect the people of Central City from various threats, particularly those of the criminal variety. In his civilian life, Wally West worked as a forensic scientist with the Central City Police Department. He join six other heroes to form the Justice League to stop the Imperium invasion.
Wonder Woman
Wonder Woman started life as a clay sculpture. Hippolyta, Queen of the Amazons, breathed life into her so that she might have a child of her own. Diana grew up the princess of the people of Themyscira. However, when World came under attack by the Imperium. Diana felt it was her duty to help. During the night, Diana secretly entered the Temple of Athena and took the goddess' magic armor. Diana left Themyscira and joined the other six individuals to combat the Imperium. Diana took on the name Wonder Woman and continued to serve with the League.
Hawkgirl
Hawkgirl was an advance scout for a Thanagarian invasion force. She explained that she found herself on Earth when, she was accidentally transported by the Zeta Beam. When J'onn J'onzz gathered Earth's heroes, she answered the call him. After the defeat of the Imperium invasion, the seven remained a team, the Justice League, dedicated to the defence of Earth.
Green Lantern
John left home to enlist in the United States Marine Corps at a fairly young age. After leaving the service, John Stewart was selected by the Guardians of the Universe to join the Green Lantern Corps. Early in his Corps career, John would train under the Green Lantern Katma Tui. Not long after John's homecoming, he join six other heroes in opposing the Imperium invasion. After the crisis, John readily agreed to Superman's suggestion that the seven heroes band together as the Justice League.
Martian Manhunter
During the invasion of Mars by the Imperium, J'onn was a member of the strike team that launched his people's final, desperate offensive. J'onn succeeded in releasing the nerve gas that placed the invaders in suspended animation. J'onn then sealed the invaders' underground headquarters. While J'onn was in a hibernation cycle, astronauts from Earth accidentally revived the invaders. J'onn awoke, managed to escape Mars, and came to Earth to warn humanity of the Imperium. J'onn J'onzz was the last Martian. J'onn can be seen as the true founder of the Justice League, having telepathically reached out to each of the founding members and gathered them together.
Other Heroes
Dr. Fate
Aquaman
Orion
Metamorpho
Foragar
Jason Blood
Etrigan
Justice Guild of America
Catmam
Green Guardsman
Black Siren
Tom Turbine
Streak
Villains
Dardseid
Darkseid was the evil ruler of the planet Apokolips. He attempted to take over Earth, which was only stopped when Orion showed up with the army of New Genesis. Darkseid brainwashed Superman, so that Superman believed that Darkseid adopted him, he set Superman against Earth. Superman returned to Apokolips and defeated Darkseid.
Brainiac
Brainiac was the planetary-wide supercomputer of Krypton. Before Krypton exploded, Brainiac uploaded its core program and all of the collected data to an artificial satellite. It began to explore the universe. Each time it came to an inhabited world, it would upload all the knowledge it could from that world then destroy it. Brainiac eventually made its way to Earth Superman destroyed his ship with the help of Lex Luthor. Although Brainiac was believed to have been destroyed, Brainiac had downloaded a copy of Brainiac's programming into LexCorp's computers.
Vandal Savage
Vandal Savage was born sometime in the prehistoric era. Around 25,000 years ago, a meteor hit the Earth, nearby where his tribe lived. Vander slept by it, as it provided warmth in the cold night. As the decades passed, he found that he never aged, and as his siblings and tribemates all grew old and died, he continued to evolve, both mentally and physically. Thousands of years later, during World War II, he received a message from his future self in the 21st century, along with designs for future weaponry.Using the new weapons, he invaded Great Britain and the United States, conquering the entire world.
Lex Luthor
Lex was born in poverty in the Suicide Slums, Lex's biggest dream was that all metropolis would look up to him. When Superman arrived Luthor wasted no expense to destroy him. He also invested heavily in Superman's enemies. After unsuccessfully battling the Justice League, Luthor was exposed as a criminal and locked away. Luthor teamed up with other villains in an attempt to defeat the Justice League.
Other Villains
Amazo
Cheetah
Clayface
Copperhead
Deadshot
Doctor Destiny
Doomsday
Draaga
Dr Blizzard
Eclipso
Felix Faust
Firefly
Gigenta
Gorilla Grodd
Hades
Joker
Harley Quinn
Despro
Radocko
Icthultu
Imperium
Morgaine Le Fay
Mordred
Desaad
Kalibak
Kanjar Ro
Killer Frost
Livewire
Lobo
Luminus
Manhunter
Metallo
Mongul
Music Master
Orm
Parasite
Poison Ivy
Ray Thompson
Shade
Sinestro
Solomon Grundy
Solovar
Sportsman
Star Sapphire
Steppenwolf
Toy man
Tsukuri
Ultra Humanite
Volcana
Weather Wizard
King
Queen
Jack
Ten
Ace
Hro Talak
Kragger
Paran Dull
Other Characters
Alfred Pennyworth
Lois Lane
Inza
Aresia
Hippolyta
Mera
Sera
Mercy Graves
Morphir
Bulldozer
Blackhawks
Colonel Vox
General Wells
General Homan
Arkkis Chummuck
Galius Zed
Katma Tui
Kilowog