Season 1 | Season 2 (X-Men) | Season 3
Season 1
Red Skull
Ultron
Taskmaster
Loki
Ebony Maw
Proxima Midnight
Black Dwarf
Thanos
Ronan
Killmonger
Green Goblin
Kraven
Mysterio
Doctor Octopus
Vulture
Electro
Sandman
Corvus Glaive
M.O.D.O.K.
Kingpin
Bullseye
Rhino
Baron Zemo
Kang
Carnage
Venom
Hela
Dormammu
Season 2
Sabretooth
Juggernaut
Mystique
Magneto
Apocalypse and the Horsemen
Scarlet Witch and Quicksilver
Mr. Sinister
Sebastian Shaw
Stryfe
Namor
Magik
Colossus
Emma Frost
Cyclops
Bob, Agent of Hydra
Deadpool (Villain)
Nimrod and Sentinels
Doctor Doom
Super-Skrull
Shadow King
Callisto
Deathbird
Arcade
Lady Deathstrike
Sauron
Silver Samurai
Omega Red
Stryfe
Brood Queen
Mojo
Dark Phoenix
Onslaught
Avalanche
Mastermind
Legion
Emma Frost
Namor
Spiral
Marrow
Toad, Blob, and Pyro
Season 3
Cosmic Ghost Rider
Immortus
Maestro
Emperor Doom
Wrecker (Kickstarter exclusive)
Thunderball (Kickstarter exclusive)
Piledriver (Kickstarter exclusive)
Bulldozer (Kickstarter exclusive)
Galactus
Air-Walker
Firelord
Terrax
Nova (Frankie Raye)
Silver Surfer (Herald cards only)
Vulcan
Apocalypse (Age of Apocalypse)
Dark Beast
Nemesis
Queen Veranke
Skrulls
Annihilus
Carnage
Morbius
Scream
Scorpion
Shriek
Demogoblin
Doppelganger
Ares
Gladiator Hulk
Sentry
Morlun
Spot
Klaw
Chameleon
Titania
Absorbing Man
Abomination
Crimson Dynamo
Crossbones
Daken
Maximus
Iron Patriot
Darkchild
U.S. Agent
Darkstar
Red Hulk
Ursa Major
Blastaar
Hobgoblin
Red Guardian
Enchantress
Knull
White Widow
Moonstone
Mole Man
Lizard
Purple Man
Shocker
Fing Fang Foom
Scarlet Witch
Agatha Harkness
Hall of United 