If those powers are well-developed enough to include heat-vision and super-strength, there's no way a clumsy, angry kid is going to hide them from a medical exam - which, make no mistake, if they're wondering why they can't manage to place this kid in a home, they're GOING to look at all possible angles, including abuse, which means LITERALLY crawling up his ass with a flashlight, simply to make sure that none of his would-be parents touched him inappropriately. Good luck trying to control his reflex reactions in an uncomfortable situation like that, when even grown adult men often can't keep from "bearing down" when they receive prostate exams.
Unless his powers are MAGIC-based, this does not pass even the rules of reality that Waid himself has established in this story.