Marvel Super Heroes Prerelease Promo Pack has no variants:
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At rate 2/145 (1.38%)
Absorbing Man
Agent Phil Coulson
Alien Invasion
Arc Reactor
Ares, God of War
Armor Wars
Avengers Disassembled
Avengers: Under Siege
Baron Helmut Zemo
Captain America's Shield
Captain America, Wings of Freedom
Castle Doom
Cloak and Dagger, Entwined
Construct a Cosmic Cube
Daredevil, Man Without Fear
Dark Fortress
Doom Reigns Supreme
Elektra, Daughter of the Hand
Epic Fight
Fin Fang Foom
Gathering Place
Gleaming Bastion
Hawkeye, Master Marksman
Heroic Feast
Hidden Lair
Ironheart, Clever Champion
Leader, Super-Genius
Loki, God of Mischief
Mole Man, Moloid Master
Moon Girl and Devil Dinosaur
Ms. Marvel, Kamala Khan
Nick Fury, Agent of S.H.I.E.L.D.
Origin of the Avengers
Quicksilver, Brash Blur
S.H.I.E.L.D. Flying Car
Scientist Supreme of A.I.M.
Secret Invasion
Storm, Windrider
Super-Adaptoid
Super-Skrull
Super-Soldier Serum
Taskmaster, Mercenary Mimic
The Astonishing Ant-Man
The Kingpin of Crime
The Mighty Thor, Jane Foster
The Ruinous Wrecking Crew
The Scarlet Witch
The Sentry, Golden Guardian
The Serpent Society
The Super Hero Civil War
The Unbeatable Squirrel Girl
The Vision
The Wondrous Wasp
Thunderbolts Conspiracy
Training Compound
Vision Quest
Winter Soldier, Icy Assassin
Wolverine, Fierce Fighter
World War Hulk
Worlds Within Worlds
At rate 1/145 (0.69%)
Avengers Assemble!
Black Widow, Super Spy
Bruce Banner
The Incredible Hulk
Captain America, Super-Soldier
Captain Marvel, Earth's Protector
Cosmic Cube
Doctor Doom
Earth's Mightiest Heroes
Iron Man Armor
Jennifer Walters
The Sensational She-Hulk
Kang the Conqueror
King T'Challa
Black Panther, Hope Enduring
M.O.D.O.K.
Mjölnir, Hammer of Thor
Monica Rambeau
Photon, Living Light
Multiversal Incursion
Namor the Sub-Mariner
Shang-Chi, Master of Kung Fu
Thanos, the Mad Titan
The Coming of Galactus
The Mind Stone
The Ten Rings
Thor, God of Thunder
Tony Stark
The Invincible Iron Man
Ultron, Artificial Malevolence