This are the characters that are going to be in this story. Please read it all and enjoy.

Earth Prime

Earth Prime is the home to the Justice League, the World's Greatest Heroes. It's full of meta-humans, aliens, monsters, and werewolves. They faced many enemies in their lives to protect this world. From the Dominator's Invasion, Earth-X Nazis, Crisis of Infinite Earths, and Armageddon, time and time again, they have grown stronger after ever fight.

The Justice League members involved:
Green Arrow—skilled archer and fighter
Flash—Speed Force super speed
Supergirl— Kryptonian powers
White Canary—skilled assassin
Black Lightning—Lightning powers
Batwoman—skilled fighter
Martian Manhunter— flying, shapeshifter, telepathy
Superman— Kryptonian powers
Black Wolf—sonic howl
Vibe—vibrational bursts, visions, opening breaches
Frost—Ice powers
Blazewolf—Fire powers
Canis Rex—Energy powers
Black Canary—sonic scream
Green Lantern-light constructs
Atom—shrinking
Heatwave—heat gun
Citizen Steel—turning into steel
Behrad—Wind powers
Zari— Wind powers
John Constantine—magic powers
Rumble—Earth powers
Aqualad—Water powers
XS-super speed
Impulse—super speed
Elongated Man—super stretching and shapshifting
Sentinel—gun and blaster
Batwing—skilled hacker and fighter
King Shark—super strength and swimmer
Goliath— gargoyle leader
Hudson— gargoyle mentor
Brooklyn—second-in-command gargoyle
Broadway—muscle gargoyle
Lexington—genius gargoyle
Bronx— hound dog gargoyle
Angela— fighter gargoyle
Coldstone—cyborg gargoyle
Mega-Man—replication of powers
Fire Man—Fire powers
Ice Man—Ice powers
Elec Man—Electric powers
Air Man—Wind powers
Wave Man—Water powers
Wood Man—Leaf shurikens
Drill Man—Drill power
Guts Man—Shockwave
Cut Man—Cut blades
Chemistry Man—Chemistry
Hypno Woman—Hypnotizing
Blasto Woman—Blaster
Danny Phantom—ghost powers
Wulf—Wolf ghost powers
Skulker—Ghost powers
Ember—Music Ghost powers
Jack Sullivan—resistance leader
Quint Baker—resistance genius
Dirk Savage—resistance muscle/monster form
June Del Toro—resistance warrior
Tigre Rojo 01—Shapeshift, molecular regeneration
Lobo Commando 02— Speed Force super speed
Espectre Gorrila 03— Shadows and nightmares
Barril El Oso 04 — capable of eating anything
Marco Toro 05— strength and super growth

(Side Heroes)
Iris West-Allen—speedster and reporter
Felicity Smoak— intelligent hacker and genius
Joe West—retired cop
Cecile—empathic abilities
Chester P. Runk— intelligent genius
Allegra— wave length powers
Ava—gun and skilled fighter
Astra—magic powers
Gary—alien
Spooner—fighter able to communicate with aliens
Ryan Choi—A.T.O.M. suit shrinking
Lois Lane—reporter
Dr.Light— inventor
Suna—fighter
Jack Fenton—inventor ghost hunter
Maddie Fenton—inventor ghost hunter
Jazz—fighter
Tucker—genius
Sam—goth fighter
Elisa—cop detective
Bardle—warlock
Skaelka—warrior
Chef—monster chef
Rover—pet monster

Killer Croc

Killer Croc is an enemy of Batman with incredible super-strength and a crocodile-like appearance. Abandoned to his abusive and alcoholic aunt and abused and bullied his entire life due to his appearance, the result of a genetic disorder he was born with, Waylon Jones embraced his animal instincts and violently murdered and devoured his aunt after he finally reached his breaking point. Joining a traveling circus and adopting the stage name of "Killer Croc", Jones bonded with his fellow carnival workers and felt like he had a family for the first time. That came to a tragic end, however, when vicious audience members in Gotham City destroyed the carnival and killed all whom Jones had felt affection for. Seeking revenge on all humanity for their crimes, Croc began to devour countless individuals to survive, and became a monster in both body and spirit. Driven by hatred and a lust for blood, Croc regularly worked with Gotham's various mob organizations as a brutal and cannibalistic hitman to satisfy his appetite for violence and money. Seeing all humans as selfish and judgmental sacks of flesh, Jones took orders from anyone who could provide him with money and a larger scope of victims. This mutation was originally a birth defect, although he becomes more reptilian over time due to genetic experimentation. Despite his brutal savagery and heightened reflexes, his animalistic mentality results in lower intelligence. Croc was eventually arrested by Harvey Bullock, but some time later he escaped prison and sought revenge against Bullock. Croc tried to frame Detective Bullock for a crime, but Batman uncovered the plot and captured Croc, clearing Bullock's name. Croc was subsequently arrested. He ran a massive gang whose members dressed as various animals. He did get married and had a kid. A boy with Waylon's Croc-gene, strong and healthy. Waylon never intended on having a kid, even knowing that his gene could be passed on. The wife unfortunately died from cancer, but before she died, she had Waylon promise her that he protect their son from those who would hurt him. He promised before she died and raised his son by himself. He tried to get his kid to follow his footsteps but William was too compassionate. Waylon just hopes his kid could get accepted better than him.

William Jones

William Jones is the son of Waylon Jones a.k.a Killer Croc. Will never got to know his mother, only to know that she was kind, gentle, compassionate, and knew how to make his dad smile and laugh from his father. He was shunned and feared by all not just for his monstrous form, but by his father's actions. He doesn't want to be villain like his father but still loves him.

Super Villains

Ultra Rouges Villains:
Anti-Matter—opening portals
Toxikita—toxic and poison powers
Invizable—turning invisible
Psyclone—Wind powers
Infearno—Fire powers
Terabyte— technopathic abilities
Adam Acid—acid powers
Retox—toxic powers
Spyclops—hacker and spider powers
Drillex—driller
Tremor—super strength and earthquake
Electroloyzer-Lightning powers
SharX—Aquatic abilities
Cyborg Brainstein— Intelligent genius
Sergeant Night—sergeant leader
Weather Wizard—weather powers
Top—cripple vertigo
Mirror Master—mirror powers
Dr. Light—light rifle
Sunshine—Light powers
Ragdoll—flexibility
Shade—shadow powers
Turtle 2–Slowing Time down
Goldface—Gold powers
Amunet Black—metal powers
Lex Luthor—genius
Psycho Pirate— psychic powers
The Royal Flush Gang
Godspeed—Super Speed
Shapshift— shapeshifting

That's the Killer Croc version I chose him to be in this story, voiced by John DiMaggio. Hope you enjoy the story!