Here are the results from the previous round:
Sinestro vs. Etrigan the Demon 12-9
Brainiac vs. Swamp Thing (Alec Holland) 6-15
Cyborg (Victor Stone) vs. Red Hood (Jason Todd) 9-12
Black Adam vs. Raven 10-11
Poison Ivy vs. Firestorm (Raymond & Rusch) 13-8
White Lantern (Kyle Rayner) vs. Ares 11-10
Gorilla Grodd vs. Elongated Man 10-11
Bizarro vs. Big Barda 10-11
You vote for the one who you like more, not who's the strongest in a fight and have fun:
Poison Ivy vs. Raven
Swamp Thing (Alec Holland) vs. Sinestro
Big Barda vs. White Lantern (Kyle Rayner)
Elongated Man vs. Red Hood (Jason Todd)