>>149686601 (OP)
>>149688189
A simpler answer is that it's just plain easier and cheaper to adapt a character that punches things. Superman, Wonder Woman, Aquaman, and Batman punch things. It's quick and easy, no need to think shit out or design anything super creative for filler episodes. Also Batman, Wonder Woman, and Aquaman have options if censors want less violence. Batman and WW can lasso someone, Awuaman can have an eel or a squid trap someone. It's all too easy.
Green Lantern will always be more expensive to animate since you now have to design about 10-15 green objects for each episode.
Flash you have to constantly do weird things like try to invent a clever way to solve the problem by running or spinning, and you have to design and animate tornadoes and blur shots a lot.
Other heroes need to be explained, their powers are annoying to depict or confusing for an audience. It's easier to just have Batman punch a guy, or kick a guy while swinging on a rope.