You vote for the one who you like more, not's who's the strongest one in a fight and have fun:
Nova (Richard Rider) vs. Cassandra Nova
Nighthawk (Kyle Richmond) vs. Colleen Wing
Moondragon vs. Bonebreaker
Volstagg vs. Proxima Midnight
Wolverine (Laura Kinney) vs. Fin Fang Foom
Gorgon (Inhuman) vs. Bruto the Strongman
The Sentry (Robert Reynolds) vs. Madame Masque
Gladiator (Kallark) vs. Darkhawk (Chris Powell)
Star-Lord (Peter Quill) vs. Thundra
Jack of Hearts vs. The Chameleon
Squirrel Girl vs. Pretty Boy
Lockjaw vs. The Clown (Eliot Franklin)
Dust (Sooraya Qadir) vs. Puff Adder
Hank Pym vs. Sebastian Shaw
Hellcat vs. Kingpin (Wilson Fisk)
Emma Frost vs. Cottonmouth (Burchell Clemens)
Jocasta vs. The Living Monolith
Thunderbird (John Proudstar) vs. Superia
Electro (Max Dillon) vs. Victor Mancha
Jubilee vs. The Rattler
Sunfire vs. The Beetle (Janice Lincoln)
Silk vs. Dracula
Triton vs. Princess Python (Zelda DuBois)
Odin vs. Black Dwarf
Dr. Druid vs. Callisto
Karnak vs. The Ringmaster (Maynard Tiboldt)
Julia Carpenter vs. Skullbuster I
Doop vs. Hyperion (Marcus Milton)
Fandral the Dashing vs. Supergiant
Groot vs. The Trapster (Peter Petruski)
Magma (Amara Aquilla) vs. The Asp
Hogun the Grim vs. Corvus Glaive
Tigra vs. Harry Leland
Cypher (Doug Ramsey) vs. Black Mamba
Mantis vs. The Puppet Master
Luke Cage vs. Donald Pierce
Warlock (Technarchy) vs. Anaconda
Beta Ray Bill vs. Ebony Maw
Rocket Raccoon vs. The Wizard
Rhino (Aleksei Sytsevich) vs. Cullen Bloodstone
Thanos vs. Angela
Blade vs. Selene
Sugar Man vs. Howard the Duck
Rachel Summers vs. Sidewinder (Gregory Bryan)
Baron Mordo vs. Quake (Daisy Johnson)
Captain America (Sam Wilson) vs. Mastermind (Jason Wyngarde)
Hydro-Man (Morrie Bench) vs. Elsa Bloodstone
Sasquatch (Walter Langkowski) vs. The Red Ghost
The Master Mold vs. Agent Venom
Ms. America (America Chavez) vs. Lady Deathstrike
The Fixer (Paul Ebersol) vs. Misty Knight
Firestar vs. The Lizard
Viper (Ophelia Sarkissian) vs. Spider-Man (Miguel O'Hara)
The Punisher (Frank Castle) vs. Cardiac
Morgan le Fay vs. Scarlet Spider (Kaine)
Gamora vs. Sandman
The Wrecker (Dirk Garthwaite) vs. Nico Minoru
Apocalypse vs. Spider-Woman (Gwen Stacy)
Thunderball vs. Molly Hayes
Ultron vs. The Two-Gun Kid (Matthew J. Hawkins)
Bulldozer (Henry Camp) vs. Chase Stein
Quasar (Wendell Vaughn) vs. Hela
Piledriver vs. Karolina Dean
Banshee (Sean Cassidy) vs. Shriek