Here’s the list. This’ll give you an idea of what kind of gameplay they’d have.
Annihilus
Trait: Exoskeleton – Increases his durability and gains more air-based abilities for a duration.
Ultimate: Armada – Unleashes the Annihilation Wave to send a large number of his followers to attack his opponent at once.
Ant-Man
Trait: Shrink – Shifts into the size of an ant, making him much harder to his and allowing more moves.
Ultimate: Someone Your Own Size… – Calls in an army of fire-ants to attack his opponent, and then finishes them off by growing into Giant-Man and slamming them into the ground.
Armor
Trait: Samurai– Forms a samurai sword, which gives her extended range and new moves but eliminates others until the stance is cancelled.
Ultimate: Arsenal – Creates a variety of different weapons and beats down her opponent with them, before finishing them off with a giant hammer.
Black Panther
Trait: Energy Absorption – Unleashes hits taken (either landed or blocked) in a powerful burst depending on the build-up.
Ultimate: Maul – As the title suggest, he mauls his opponent repeatedly with his claws.
Captain America
Trait: Shield – Stance that places his shield in front of him, giving him unique moves while eliminating others until the stance is cancelled.
Ultimate: Justice Bringer – Knocks his opponent in the air and throws his shield to deliver a devastating attack.
Captain Marvel
Trait: Binary – Goes into her Binary state, marked by her a flaming aura. It temporarily increases her attack power.
Ultimate: Supernova – Creates a miniature sun and throws it at her opponent.
Cloak & Dagger
Trait: Partner – Calls either Cloak or Dagger (depending on character selected) to attack, with different variations depending on button combination.
Ultimate: Darkness & Light – Cloak transports the opponent to the Darkforce Dimension, and attacks the opponent with dark matter, just as Dagger creates a giant light dagger to finish them off.
Dazzler
Trait: In the Groove – Switch song-types (disco, rock, electronic etc.) to give her abilities different effects.
Ultimate: The Power of Music – Creates a giant disco area where Dazzler absorbs all the energy, and then blasts her opponent in one strike.
Deadpool
Trait: Healing Factor – Heals his wounds to a certain degree, but cannot attack while during the process.
Ultimate: Overkill – Performs gun kata which he mixes his martial arts with guns and swords, slashing and shooting his opponent one after another, before finishing them off with a grenade.
Doctor Doom
Trait: Summoner – Summons a demonic creature to his aide for a brief period.
Ultimate: Hellbound – Grabs his opponent and takes them to Hell, where they’re attacked by a horde of demons, and Doom finishes them off with a blast of lightning.
Doctor Octopus
Trait: Octo-Stance – Uses two of his tentacles to do stand, giving him better aerial options and new moves.
Ultimate: Striking Power – Holds the opponent with two arms, and strikes them repeatedly with the other two, before throwing them away.
Doctor Strange
Trait: Astral Projection – Releases his astral form from his body, which greatly increases his speed and attack power, albeit leaving his body vulnerable.
Ultimate: Duplication – Creates many clones of himself to surround the opponent, and all of them attack with mystical powers simultaneously.
Enchantress
Trait: Time Disruption – Slows down time within her vicinity while she remains at normal speed, allowing her easy combos.
Ultimate: Illusionist – Creates an illusion of various creatures attacking her opponent, and then finishes them off with a giant stomping on them.
Ghost
Trait: Ghost Form – Turns on the invisibility in his suit, making him nearly unable to be seen, and thus giving the player a tactical advantage.
Ultimate: Deathly Surprise – Turns invisible, phases through the ground and appears behind the opponent. He then plants an explosive on their back, which detonates afterwards.
Gwenpool
Trait: Explosions – Creates a random “accidental” explosion that happens to be near the opponent’s vicinity.
Ultimate: Boom! – Takes out a heatseeking rocket launcher and blasts the opponent with it repeatedly.
Hawkeye
Trait: Trick Arrow – Selects between a number of different arrows (fire, electricity, ice) that has different effects but can only be used once per meter.
Ultimate: Archery Assault – Shoots various kinds of arrows in a single barrage at the opponent, including fire, electricity, and ice.
Hulk
Trait: You Wouldn’t Like Me When I’m Angry… – Gets angrier for a period, which increases his attack power and regenerates his health to an extent.
Ultimate: Hulk Smash! – Grabs the opponent by the leg and replicates the iconic move from the MCU.
Iron Man
Trait: Overclock – Charges his suit with electricity, increasing his speed and projectile potency.
Ultimate: Death from Above – Sends an army of suits to grab his opponent, and then fires a gigantic laser from his chest to finish them off.
Juggernaut
Trait: Cyttorak Empowerment – Increases his speed for a period to deliver his high-power attacks at a very fast rate.
Ultimate: Wrath of the Juggernaut – Grabs the opponent by the neck and unleashes a beatdown before stomping on them.
Magneto
Trait: Magnetic Forcefield – Surrounds himself with a forcefield that makes him immune to damage briefly.
Ultimate: Master of Magnetism – Forms a bunch of metal around the opponent and throws them a great distance, before blasting them with multiple beams of magnetic rays.
Moon Knight
Trait: Power of Khonshu – Temporarily increases his strength and projectile speed through the power of the god he worships.
Ultimate: Divine Punishment – Grapples around his opponent with his grappling hook to tie them in place, and then calls in the Mooncopter piloted by du Champ to deliver a blast of death.
Ms. Marvel
Trait: Embiggen – Grows large, which slows her down but increases her damage.
Ultimate: Morpho – Stretches and grabs her opponent, before tossing them around like a ragdoll.
Nico Minoru
Trait: Staff of One – Nico has a wide variety of special moves the can change the course of the fight, but can only be used once during the match.
Ultimate: Blood Magic – Uses the Staff of One to create a variety of effects that all attack the opponent, namely ice, a rain of bats, and a finally a sword.
Nova
Trait: Nova Force – Nova’s power increases over the course of the match, which he unleashes at once with the press of a button.
Ultimate: Human Rocket – Blasts through his opponent at full speed, deliver a massive and flame-enhanced punch.
Psylocke
Trait: Psionic Weapons – Utilize different weapons in combat, such as her katana, crossbow, bow and arrow, and claws.
Ultimate: Death Strike – Uses her katana to deliver a number of deadly strike, and finishes them off with a swift blow to the neck.
Rocket Raccoon
Trait: Gun for Hire – Uses various guns with different effects, depending on the one selected.
Ultimate: The Best Pilot in the Galaxy – Jumps in his ship and blasts his opponent with everything he’s got.
Sentinel
Trait: Sentinel Force – Summons other sentinels to perform commands depending on the input.
Ultimate: Sentinel Beatdown – Sentinel and others join together to beat down his opponent.
She-Hulk
Trait: Special Training – Slows down her meter, allowing her to perform special moves for less.
Ultimate: Judge, Jury and Executioner – Grabs her opponent and spins them around quickly, before throwing them away. Then she tosses a car that lands directly on them.
Spider-Man
Trait: Way of the Spider – Alternate stance that changes his move set to a more precision-based one.
Ultimate: All Webbed Up – Completely encases his opponent in webbing before sling them up in the air and dropping them down to the ground.
Spider-Woman
Trait: Venom Blast – Shoots a blast of bio-electricity that if landed will stun her opponent temporarily and leave them open to an attack.
Ultimate: Spider Attack – Flies through the air to deliver multiple attacks in different directions, then finishes them off with an enhanced Venom Blast.
Star-Lord
Trait: Jet Boots – Alternate stance that gives Star-Lord aerial control.
Ultimate: Showtime, A-Holes! – Barrage of laser that repeatedly strike his opponent down.
Storm
Trait: Goddess of Weather – Temporarily increases the power of her projectiles while keeping her in the air.
Ultimate: Elemental Fury – Summons a variety of different weather attacks, such as thunder, earthquakes, wind, and lightning, to strike down her opponent.
Super-Skrull
Trait: All for One – Enables the powers of the Fantastic Four to be used at once, giving him more potential for damage in a period.
Ultimate: Fantastic – Delivers a beatdown to his opponent that involves the use of all the Fantastic Four’s powers.
Taskmaster
Trait: Photographic Memory – Temporarily enables him to use combos easier than before and chain them with little effort.
Ultimate: Variety of Death – Beat his opponent down with a shield and sword upclose, before knocking them away and shooting an arrow at them. Finally, he tosses a grenade and it explodes.
Thanos
Trait: Turn to Stone – Shoots a beam that, if hit, will temporarily turn his opponent into a statue.
Ultimate: Moon Drop – Telekinetically breaks down a moon and drops the pieces on the opponent.
Thor
Trait: Lightning – Surrounds himself with lightning and gives him extra projectiles while giving his punches extra bleed out damage.
Ultimate: God of Thunder – Drops Mjölnir on his opponent to keep them in place, and then summons a massive lightning strike on top of them.
Wolverine
Trait: Feral State – Temporarily enters an animal-like state, which increases his speed and regenerates a degree of damage.
Ultimate: Cut to Pieces – Unleashes a variety of slashes using his adamantium claws.
X-23
Trait: Assassin – Temporarily increases the range of the blades on her hands and feet.
Ultimate: Circle of Death – Does three somersaults that slashes her opponent with bladed attacks.