These are the approved characters

Adam Warlock
Agent Carter
Alfred Pennyworth
America Chavez
American Dream
Angel
Ant-Man
Apache Chief
April O’Neil
Aquaman
Arthur
Atom
Azrael
Bane
Banshee
Batgirl
Batman
Batwoman
Beast
Beast Boy
Beta-Ray Bill
Bishop
Bizarro
Black Adam
Black Alice
Black Bolt
Black Canary
Black Cat
Black Lightning
Black Manta
Black Mask
Black Panther
Black Widow
Blade
Blue Beetle
Booster Gold
Braniac
Bucky Barnes
Bullseye
Bumblebee
Cable
Cannonball
Captain America
Captain Britain
Captain Marvel
Captain Marv-Vell
Cassandra Nova
Catwoman
Cobra Commander
Colossus
Comedian
Conan the Barbarian
Cottonmouth
Cyborg
Cyclops
Daredevil
Darkseid
Dazzler
Deadpool
Deadshot
Deathlok
Deathstroke
Deku
Doctor Aphra

Doctor Doom
Doctor Manhattan
Doctor Octopus
Doctor Strange
Domino
Drax
Edward Elric
Electro
Elektra
Emma Frost
Flash
Galactus
Gambit
Gamora
Genos
Ghost
Ghost Rider
Gohan
Goku
Golden Age Sandman
Goten
Green Arrow
Green Goblin
Green Lantern
Grim Repear
Groot
Gwendolyn Dylan
Gwenpool
Hawkeye
Hawkgirl
Hawkman
Hellboy
Hitman
Hob Goblin
Howard the Duck
Hulk
Human Torch
Huntress
Inuyasha
Invisible Man
Invisible Woman
Iron Fist
Iron Man
J. Jonah Jameson
Jackal
Jean Grey
Jessica Jones
Jigsaw
Jinx
Joker
Jubilee
Judge Dredd
Juggernaut
Katana
Kingpin
Kitty Pryde
Krillin
Lady Deathstrike
Leader
Lex Luthor
Lobo
Loki
Luke Cage
Mad Hatter

Madelyne Pryor
Madman
Magik
Magneto
Mandarin
Martian Manhunter
Mask
Master Roshi
Matt Murdock
Mera
Miracleman
Mister Sinister
Moon Knight
Morpheus
Mr. Fantastic
Mr. Freeze
Mr. Miracle
Mr. Sinister
Mysterio
Mystique
Namor, the Sub-Mariner
Nebula
Nezuko Kamado
Nick Fury
Nightcrawler
Nightwing
Nite Owl
Nova
Nuke
Omega Red
Ozymandias
Penguin
Phantom
Phoenix
Piccolo
Poison Ivy
Power Girl
Prodigy
Professor X
Prowler
Psylocke
Puck
Punchline
Punisher
Quasa
Quicksilver
Ra’s Al Ghul
Raven
Red Arrow
Red Hood
Red Skull
Riddler
Robin
Rogue
Rorschach
Sabretooth
Sailor Jupiter
Sailor Mercury
Sailor Moon
Sailor Pluto
Sailor Saturn
Saitama (One Punch Man)
Savage Dragon
Scarecrow

Scarlet Witch
Sentinels
Seto Kaiba
Shang-Chi
Shazam!
She-Hulk
Shredder
Shuri
Silk Spectre
Silver Sable
Silver Samurai
Silver Surfer
Sinestro
Skrull
Snake-Eyes
Solomon Grundy
Spawn
Spectre
Spider-Gwen
Spider-Man
Spider-Woman
Squirlgirl
Starfire
Star-Lord
Steel
Storm
Superboy
SuperGirl
Superman
Superman-Prime
Swamp Thing
Tanjiro Kamado
Tank Girl
Taskmaster
Thanos
The Crow
Thing
Thor
Tick
Tigra
TMNT Donatello
TMNT Leonardo
TMNT Michaelangelo
TMNT Rafael
TMNT Splinter
Tony Stark
Trunks
Two-Face
Ultron
Vegeta
Venom
Vision
Vulture
War Machine
Wasp
Whiplash
Witchblade
Wolverine
Wonder Woman
X-23
Yugi Muto
Zatanna
Zemo
Zsasz