You vote for the one who you like more, not who's the strongest one in a fight and have fun:
Mar-Vell vs. Lady Deathstrike
Mandrill vs. Darkhawk (Chris Powell)
Ronan the Accuser vs. Cloak
Spiral vs. Firestar
Cecilia Reyes vs. The Kangaroo (Brian Hibbs)
Feral vs. Grizzly (Maxwell Markham)
Ulik vs. The Human Torch (Jim Hammond)
Ms. Marvel (Kamala Khan) vs. Ramrod
Dust (Sooraya Qadir) vs. Hydro-Man (Morrie Bench)
The Leader vs. Namora
Songbird vs. Mastermind (Jason Wyngarde)
Morgan le Fay vs. Rachel Summers
Psycho-Man vs. Cypher (Doug Ramsey)
Meggan Braddock vs. Batroc the Leaper
Genis-Vell vs. Ruckus
Thanos vs. Finesse
The Abomination vs. Mettle
Green Goblin (Norman Osborn) vs. The Destroyer (Roger Aubrey)
Dormammu vs. Layla Miller
The Porcupine (Roger Gocking) vs. Gargoyle (Isaac Christians)
Kingpin (Wilson Fisk) vs. Cullen Bloodstone
Julia Carpenter vs. Selene
The Collector vs. Rage
Hepzibah vs. The Gibbon (Marty Blank)
Moondragon vs. Harry Leland
The Impossible Man vs. Warlock (Technarchy)
Sasquatch (Walter Langkowski) vs. Titanium Man (Boris Bullski)
Colleen Wing vs. Erik Killmonger
Boomerang vs. Spitfire (Jacqueline Falsworth)
The Shocker (Herman Schultz) vs. Jolt
War Machine (James Rhodes) vs. Donald Pierce
The Chameleon vs. Reptil
Ant-Man (Scott Lang) vs. The Walrus
Jessica Jones vs. Pretty Boy
Firelord vs. Shatterstar
Shang-Chi vs. Bonebreaker
Darkstar (Laynia Petrovina) vs. Sin
The Beetle (Janice Lincoln) vs. Speedball (Robbie Baldwin)
Mystique vs. Hazmat
Dr. Voodoo vs. Maximus the Mad
Skurge the Executioner vs. Justice
Rictor vs. Terrax the Tamer
Balder the Brave vs. Dragon Man
Morbius vs. The Blazing Skull (Mark Todd)
Drax the Destroyer vs. Skullbuster I
Sam Wilson vs. Korvac
Maggott vs. The Trapster (Peter Petruski)
Ms. America (America Chavez) vs. Crimson Dynamo (Dmitri Bukharin)
Goliath (Bill Foster) vs. Slab
Wolfsbane vs. The Black Talon (Samuel Barone)
Fantomex vs. Arnim Zola
Forge vs. Diamondback (Rachel Leighton)
Ironheart (Riri Williams) vs. Paladin
Dr. Octopus (Otto Octavius) vs. Franklin Richards
Rocket Racer (Robert Farrell) vs. MACH-X (Abner Jenkins)
Madelyne Pryor vs. Dr. Nemesis (James Bradley)
Anole vs. The Spot
Karma vs. Silver Samurai (Shingen Harada)
N'Kantu the Living Mummy vs. Hairbag
The Punisher (Frank Castle) vs. Flag-Smasher (Karl Morgenthau)
Silk vs. Gorgeous George
Blade vs. The Scarecow (Ebenezer Laughton)
Thor (Jane Foster) vs. Moonstone (Karla Sofen)
Sebastian Shaw vs. Phyla-Vell