I hereby move to shift conflict to Krillin (DBZ) vs Genos (OPM).
Round 1: Base Genos (Mosquito Girl, Armored Gorilla, Carnage Kabuto, Charanko, Machine God G4 fights)
Round 2: Arms Mode Genos (Saitama, Giant Meteor, Sea King, Grizzly Nyah, Machine God G4 fights)
Round 3: Machine God Genos (Speed o' Sound Sonic fight)
Their personalities may be completely different, but these two are a pretty good match. Both of them function as lovable (or at least pitiable) sidekicks, with power levels far above most other characters, who nevertheless spend most of their screen time getting wrecked by whatever the hero's going to fight next. For the sake of balancing, it's probably best to take Krillin at his most powerful from DBZ. The fight will take place on the same stage as was used for the Dr. Gero fight in said DBZ.
Thoughts?