You vote for the one who you like more, not who's the strongest in a fight and have fun:
The Punisher (Frank Castle) vs. Bullseye
Northstar vs. Ikaris
Hulkling vs. The Absorbing Man
Medusa vs. Gorgon
Jessica Jones Cage vs. Spitfire (Jacqueline Crichton)
Nico Minoru vs. The Collector
Angel (Warren Worthington III) vs. The Vanisher
The Blob vs. Husk
Molly Hayes vs. Silver Samurai (Shingen Harada)
Taskmaster vs. Stature
Shocker (Herman Schultz) vs. The Red Hulk
Patriot (Eli Bradley) vs. Scarlet Spider (Kaine)
Rachel Summers vs. Pyro
Darkhawk vs. Surge
Hawkeye (Kate Bishop) vs. Noh-Varr
The Black Cat vs. Deathlok (Michael Collins)
Speedball vs. Hollow
Green Goblin (Norman Osborn) vs. The Leader
Emma Frost vs. Chamber
Sasquatch (Walter Langkowski) vs. Reptil
Sunfire vs. The Living Monolith
Ant-Man (Scott Lang) vs. Egghead (Elihas Starr)
Hellcat vs. Triton
Crystal vs. Karnak
Mr. Fantastic vs. Giganto I
Karolina Dean vs. Satanna
Warpath (James Proudstar) vs. Sunspot
Star-Lord vs. Gladiator (Kallark)
Cloak vs. Lockjaw
Dagger vs. Blindfold
Tigra vs. Plantman
Domino (Neena Thurman) vs. Copycat
Spider-Woman (Jessica Drew) vs. Dracula
Professor X vs. Stacy X
Speed vs. Angela
Iceman vs. Mastermind (Jason Wyngarde)
Iron Fist (Danny Rand) vs. Angar the Screamer
Nighthawk (Kyle Richmond) vs. Outlaw
Ghost Rider (Johnny Blaze) vs. The Miracle Man (Joshua Ayers)
X-23 vs. Red Skull
Thor (Jane Foster) vs. Odin
Cannonball vs. Hyperion (Marcus Milton)
White Tiger (Ava Ayala) vs. Plunderer (Edgar Plunder)
Ms. America (America Chavez) vs. Shanna the She-Devil
Spectrum (Monica Rambeau) vs. Blue Streak (Jonathan Swift)
Dr. Octopus vs. Mysterio (Quentin Beck)
Klara Prast vs. The Mandarin
Sersi vs. Finesse
Chase Stein vs. Diamondback (Rachel Leigton)
Jubilee vs. Shiklah
Victor Mancha vs. Lady Deathstrike
Daimon Hellstrom vs. Meggan Braddock
Old Lace vs. Black Knight (Dane Whitman)
Morbius vs. Arachne (Julia Carpenter)
Fandral the Dashing vs. Bling!
Elsa Bloodstone vs. Cullen Bloodstone
Hogun the Grim vs. Anole
Mar-Vell vs. Oracle
Volstagg vs. Prodigy (David Alleyne)
Black Widow (Natasaha Romanova) vs. Maria Hill
Electro (Max Dillon) vs. Gentle
Wiccan vs. Titania
Baron Zemo (Helmut) vs. Armor (Hisako Ichiki)
Wolverine vs. Silver Fox