You vote for the one who you like more, not who's the strongest in a fight and have fun:
Batwoman (Kate Kane) vs. Midnighter
Vandal Savage vs. The Wizard
Mademoiselle Marie (Josephine Tautin) vs. Mary Marvel
The Mad Hatter vs. Mento
Firestorm (Raymond & Rusch) vs. Weather Wizard
Lady Shiva vs. Guardian (Jim Harper)
Granny Goodness vs. Lightning Lass
Robotman (Cliff Steele) vs. The Brain
Copper vs. Mongul I
The Tattooed Man (Mark Richards) vs. Green Lantern (Mogo)
Manhunter (Kate Spencer) vs. Blue Lantern (Saint Walker)
Trickster (James Jesse) vs. Mark Moonrider
The Creeper (Jack Ryder) vs. Hugo Strange
Frankenstein vs. The Manhattan Guardian
Crimson Fox (D'Amaris twins) vs. Psimon
Superboy (Kon-El) vs. Harm
Atom (Ryan Choi) vs. Queen Bee (Zazzala)
The Cheetah (Barbara Minerva) vs. Big Bear
Solomon Grundy vs. Jayna
Red Hood (Jason Todd) vs. Neutron
Ice vs. Rocket Red (Dmitri Pushkin)
Count Vertigo vs. Elasti-Girl
Orion vs. Bruno Mannheim
The Spectre (Jim Corrigan) vs. Wotan
Big Barda vs. Devastation
Hourman (Rick Tyler) vs. Icicle (Cameron Mahkent)
Etrigan the Demon vs. Blackbriar Thorn
Black Manta vs. Tigress (Artemis Crock)
Dr. Light (Kimiyo Hoshi) vs. Monsieur Mallah
Star Sapphire (Carol Ferris) vs. Green Lantern (Arisia Rrab)
Static vs. Rocket
Sandy Hawkins vs. Kobra (Jeffrey Burr)
Gorilla Grodd vs. Zan
Jesse Quick vs. The Ultra-Humanite
Artemis of Bana-Mighdall vs. Wonder Girl (Cassandra Sandsmark)
Metamorpho vs. L-Ron
Black Lightning vs. Geo-Force
Nightshade vs. Gizmo
Ra's Al Ghul vs. Kid Eternity
Red Lantern (Guy Gardner) vs. Despero
Forager vs. Amazo
Harley Quinn vs. Mr. Mxyzptlk
Poison Ivy vs. Thorn (Rhosyn Forrest)
Lightray vs. Shimmer
Shade (Richard Swift) vs. Max Mercury
The Resurrection Man vs. Mammoth
Brainiac 5 vs. Lightning Lad
Ares vs. Sandman (Morpheus)
Ragman (Rory Regan) vs. Professor Ivo
Toyman (Winslow Schott) vs. Vox (Mal Duncan)
Fire vs. Atomic Skull
Secret vs. Phantom Lady (Jennifer Knight)
Cosmic Boy vs. T.O. Morrow
Klarion the Witch Boy vs. Negative Man
Plastic Man vs. Shadow-Thief (Carl Sands)
Ursa vs. Mon-El
The Shining Knight (Sir Justin) vs. Jinx
Killer Croc vs. Green Lantern (Ch'p)
Madame Xanadu vs. Abra Kadabra
Firefly (Garfield Lynns) vs. Bumblebee
Cheshire vs. Vykin the Black
Giganta vs. Dreamer Beautiful
Felix Faust vs. Serafina Baldaur
Robin (Damian Wayne) vs. The Spoiler (Stephanie Brown)