Here comes the most anticipated segment for comparison of these two characters i.e. Nightwing vs Supergirl superpowers. Powers and abilities define their strength, both physical and mental. So what will happen if these two super characters engage in a fight? Here you can compare Nightwing vs Supergirl powers, abilities, weapons and gadgets. So lets check out Nightwing Powers and Supergirl Powers.Decide who is more powerful!