You vote for the one who you like more, not who's the strongest one in a fight and have fun:
Hank Pym vs. Sugar Man
Strong Guy vs. The Absorbing Man
The Shocker (Herman Schultz) vs. Frog-Man (Eugene Padillo)
The Vulture (Adrian Toomes) vs. Silk
Cable vs. Flag-Smasher (Karl Morgenthau)
The Ghost vs. Fantomex
The Grizzly (Maxwell Markham) vs. Silver Sable (Silver Sablina)
Wonder Man vs. Graviton
Paladin vs. Dr. Druid
Mysterio (Quentin Beck) vs. Spider-Girl (Anya Corazon)
Chamber (Jonothan Starsmore) vs. Egghead (Elihas Starr)
Songbird vs. M.A.C.H.-VII (Abner Jenkins)
Lockjaw vs. Carnage
Synch vs. Mr. Hyde
Jessica Jones vs. Batroc the Leaper
Julia Carpenter vs. Titanium Man (Boris Bullski)
M (Monet St. Croix) vs. The Grey Gargoyle
Ms. Marvel (Kamala Khan) vs. The High Evolutionary
Rocket Raccoon vs. Pyro
The Spot vs. Manifold
Dr. Voodoo vs. Ulik
Emma Frost vs. Beef
The Hood (Parker Robbins) vs. Sleepwalker
Amora the Enchantress vs. Starfox
Sunfire vs. Dracula
Will o' the Wisp vs. Theresa Cassidy
Drax the Destroyer vs. Avalanche
Rachel Summers vs. Tyrannus
Mirage (Desmond Charne) vs. Jocasta
Warpath (James Proudstar) vs. Count Nefaria
Odin vs. The Puppet Master
Hellion (Julian Keller) vs. Titania (Mary MacPherran)
The Super-Skrull vs. Genis-Vell
Tigra vs. Arkon
Doorman (Demarr Davis) vs. Vertigo
M.O.D.O.K. vs. Doop
Apocalypse vs. Quentin Quire
Big Bertha vs. Arclight
Hepzibah vs. The Porcupine (Roger Gocking)
Thanos vs. Sersi
Skin vs. Radioactive Man (Chen Lu)
Ghost Rider (Johnny Blaze) vs. The Red Skull
Blade vs. Mojo
Husk vs. Tiger Shark
White Tiger (Ava Ayala) vs. Rhino (Aleksei Sytsevich)
Ultron vs. Squirrel Girl
Dinah Soar vs. Harpoon
Banshee (Sean Cassidy) vs. Emplate
Mr. Immortal vs. Riptide
Elsa Bloodstone vs. Zzzax
Hollow vs. Scorpion (Mac Gargan)
The Man-Thing vs. Spiral
Flatman vs. Scalphunter
Sif vs. The Kangaroo (Brian Hibbs)
Black Tom Cassidy vs. Heimdall
Black Knight (Dane Whitman) vs. The Gibbon (Marty Blank)
Boomerang vs. Gorgon (Inhuman)
Angel (Warren Worthington III) vs. Moses Magnum
Speed Demon vs. Karnak
Sunspot vs. Attuma
Vermin vs. Triton
Dr. Octopus (Otto Octavius) vs. Spider-Man (Miles Morales)
Mikhail Rasputin vs. Balder the Brave
Ant-Man (Scott Lang) vs. Dark Beast