You vote for the one who you like more, not who's the strongest one in a fight and have fun:
Emma Frost vs. Hellcat
Maximus the Mad vs. Boom-Boom
Puck (Eugene Judd) vs. Whiplash (Anton Vanko)
Domino (Neena Thurman) vs. Klaw
Longshot vs. Man-Ape
Snowbird vs. Blizzard (Donald Gill)
Quasar (Wendell Vaughn) vs. D'Ken
Thundra vs. Speed
Howard the Duck vs. Korvac
Sasquatch (Walter Langkowski) vs. M.O.D.O.K.
Sandman vs. Patriot (Eli Bradley)
Aurora vs. Madame Masque
War Machine (James Rhodes) vs. Grim Reaper
Bullseye vs. Thunderbird (John Proudstar)
Shaman vs. Dreadknight
Shang-Chi vs. Fin Fang Foom
Viper (Ophelia Sarkissian) vs. Pixie (Megan Gwynn)
Goliath (Bill Foster) vs. Morbius
Hawkeye (Kate Bishop) vs. Baron Zemo (Helmut)
Night Trasher (Dwayne Taylor) vs. Blastaar
Speedball (Robbie Baldwin) vs. Nitro
Dagger vs. Nuke
Nighthawk (Kyle Richmond) vs. Sage
Firebird vs. Madelyne Pryor
Kraven the Hunter (Sergei Kravinoff) vs. Shanna the She-Devil
Phyla-Vell vs. The Leader
Captain America (Sam Wilson) vs. Black Widow (Yelena Belova)
Kang the Conqueror vs. Spider-Man (Miguel O'Hara)
The Molecule Man vs. Union Jack (Joseph Chapman)
Kingpin (Wilson Fisk) vs. Stingray
Moonstone (Karla Sofen) vs. Doc Samson
The Living Laser (Arthur Parks) vs. Forge
The Lizard vs. Molly Hayes
Moondragon vs. Sauron
The Prowler (Hobie Brown) vs. Scarlet Spider (Kaine)
Dracula vs. Victor Mancha
The Punisher (Frank Castle) vs. Hyperion (Marcus Milton)
The Trapster (Peter Petruski) vs. Stature
Darkhawk (Chris Powell) vs. Annihilus
Groot vs. Terrax the Tamer
The Wizard vs. Hulkling
Morgan le Fay vs. The Human Torch (Jim Hammond)
Gamora vs. Lady Deathstrike
Dormammu vs. Nico Minoru
Angela vs. The Super-Skrull
Balder the Brave vs. Malekith the Accursed
The Purple Man vs. Cloak
Star-Lord (Peter Quill) vs. Firelord
The Chameleon vs. Wolfsbane
Guardian (James Hudson, Jr.) vs. Constrictor
Ms. America (America Chavez) vs. Ronan the Accuser
Vindicator (Heather Hudson) vs. The Mandarin
Gladiator (Kallark) vs. U.S. Agent
Northstar vs. Iron Monger (Obadiah Stane)
Nebula vs. Karolina Dean
Cannonball vs. Ares
The Scarecrow (Ebanezar Laughton) vs. Mar-Vell
Luke Cage vs. The Owl
Omega Red (Arkady Rossovich) vs. Chase Stein
Jubilee vs. The Mad Thinker
Stryfe vs. Ka-Zar (Kevin Plunder)
Beta Ray Bill vs. Crossbones
The Living Brain vs. Machine Man
Mystique vs. Daimon Hellstrom