For the Aquarian, has the guy ever been defeated? If so, how? Have we never seen him harmed, or only seen him harmed by people vastly above Supes? What is the most potent attack his null field nullified? Does he nullify superpowers themselves or attacks? In other words, would Supes be powerless by merely standing next to him?
Finally, does he have any way of actually preventing Supes from playing keepaway indefinitely? Or until one of them dies of old age? Is Aquarian immortal? Does he need to eat, drink, or sleep?