This bracket has been nothing but a popularity contest. (Which is a shame, but not a surprise.)
So Flash over CJ. Create a vacuum around her, and with Flash’s speed, he could do this within any radius and quickly. Jane’s brain can’t work without oxygen. Even if she teleports he can get to that location in a flash and take the oxygen out as well. Barry at the top of the bracket.
Yes, this should have been a match between QH vs HF. With HF, bloodied and bruised, but cutting down the net from this bracket.