You vote for the one who you like more, not's who's the strongest one in a fight and have fun:
Ghost Rider (Johnny Blaze) vs. Speed Demon
Blastaar vs. Night Trasher (Dwayne Taylor)
Dr. Voodoo vs. Madelyne Pryor
Ronan the Accuser vs. Noh-Varr
Moonstone (Karla Sofen) vs. Spider-Man (Miles Morales)
M (Monet St. Croix) vs. The Absorbing Man
Domino (Neena Thurman) vs. Morbius
Longshot vs. The Eel (Edward Lavell)
Hepzibah vs. The Mole Man
Bullseye vs. Skaar
Ant-Man (Scott Lang) vs. Stryfe
Attuma vs. Living Lightning
Wonder Man vs. Beef
Omega Red (Arkady Rossovich) vs. Thunderstrike (Eric Masterson)
Sunspot vs. Jetstream
Kraven the Hunter (Sergei Kravinoff) vs. The Sentry (Robert Reynolds)
Northstar vs. Air-Walker (Gabriel Lan)
The Super-Skrull vs. 3-D Man (Delroy Garrett, Jr.)
Cannonball vs. Roulette (Jennifer Stavros)
Annihilus vs. Jack of Hearts
Hawkeye (Kate Bishop) vs. Catseye
Forge vs. Mach VII (Abe Jenkins)
Black Knight (Dane Whitman) vs. Lady Bullseye
Aurora vs. Firelord
Wiccan vs. The Red Skull (Johann Schmidt)
Banshee (Sean Cassidy) vs. Carnage
Shaman vs. Baron von Strucker
White Tiger (Ava Ayala) vs. The Living Laser (Arthur Parks)
Green Goblin (Norman Osborn) vs. Thor (Jane Foster)
The Vulture (Adrian Toomes) vs. Nightwatch
Warpath (James Proudstar) vs. Tarot
Nick Fury Sr. vs. The Shocker (Herman Schultz)
Atlas (Erik Josten) vs. Surge (Noriko Ashida)
Jessica Jones-Cage vs. Baron Zemo (Helmut)
Dagger vs. Hypno-Hustler
Mesmero vs. Deathlok (Henry Hayes)
Shang-Chi vs. Diamondback (Rachel Leighton)
Cybermancer vs. Gladiator (Kallark)
Doc Samson vs. Empath
Starfox vs. Blizzard (Donald Gill)
Genis-Vell vs. Vulcan (Gabriel Summers)
The Mandarin vs. Ka-Zar (Kevin Plunder)
The Vanisher vs. Spider-Girl (Anya Corazon)
Pixie (Megan Gwynn) vs. Titania (Mary MacPherran)
Graviton vs. Dust (Sooraya Qadir)
Speedball (Robbie Baldwin) vs. Paladin
Mystique vs. Synapse (Emily Guerrero)
Terrax the Tamer vs. Firebird
Boom-Boom vs. The Radioactive Man (Chen Lu)
Ms. Marvel (Kamala Khan) vs. Boomerang
Tiger Shark vs. Silverclaw
Galactus vs. Nova (Sam Alexander)
The Leader vs. Moon Girl (Lunella Lafayette)
Taskmaster vs. U.S. Agent
The Grey Gargoyle vs. Squirrel Girl
War Machine (James Rhodes) vs. Egghead (Elihas Starr)
Titanium Man (Boris Bullski) vs. Armor (Hisako Ichiki)
Dr. Octopus (Otto Octavius) vs. Ikaris
The Mad Thinker vs. Goliath (Bill Foster)
Angel (Warren Worthington III) vs. Deathbird
Awesome Android vs. Devil Dinosaur
Sabretooth vs. Jack Flag
The Melter (Bruno Hogan) vs. Cloak
Amora the Enchantress vs. The Hulk (Amadeus Cho)