Black Canary
One of the better known characters we have on this list is Black Canary, though I’m sure that much of her popularity recently stems from Arrow. Obviously if they decide to include the Green Arrow in Justice League (which they should), Black Canary should be an integral part as well. There isn’t anything much better than a super couple, and there are few of those more entertaining than Oliver Queen and his sonic screaming seductress.
Canary’s biggest power is the Canary Cry, which has been known to make ears hurt through the pages of a comic. I’m not entirely sure how well that would translate to the big screen, but I’m pretty certain that a high-pitched blasting shriek would have some effect in a theater. She also knows acrobatics and plenty of forms of martial arts.
But let’s be real here, the Cry is where things get really exciting.