Is the universe still flat? Why do so few scientists understand, accept, and discuss the systemic problems inherent in a flat universe metatheory (a.k.a. the Standard Model of Cosmology)? Furthermore, why are the majority of physicists and astrophysicist so certain, that in the upcoming CERN antimatter gravity free fall experiments, that antihydrogen will fall down in the Earth’s gravitational field? And why are the remaining minority so certain that antihydrogen will fall up? Why does no one predict a null result (as I do)? The upcoming 2022 CERN ALPHA antimatter gravity free fall experiments are crucial tests of quantum gravity. But the predictions, that antihydrogen atoms will fall down or up, are based on false confidence in classical gravity analogies. Much physics is gravitationally unsolved or disputed. Baryon asymmetry, cosmic inflation, extra dimensions, size and shape of the universe, black hole information paradox, white holes, the equivalence principle, the graviton, quantum gravity, dark matter, and whether gravitational waves carry energy or not are disputed or unsolved gravity physics problems. If antihydrogen atoms fall down in the Earth’s gravitation field, we learn little; if they fall up, we learn a bit more. But with a high precision null result, in CERN’s upcoming antimatter gravity free fall experiments, physics and astronomy will need to reconsider everything. I cannot think of another gravity experiment, that is possibly more consequential to the development of quantum gravity and that opens the floodgates of new physics. So why aren’t theorists sharpening their pencils and developing hypotheses that would explain a null result to the upcoming CERN antimatter gravity experiment? Lack of imagination? Overconfidence? Certainty? Let’s try to loosen the authority of the peer reviewed crowd. Galileo said, “In science the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.” If in the CERN antimatter gravity free fall experiments antihydrogen falls up or down; then my recent paper A Toy Gravity Universe and the Quantum Graviton (which predicts a null result) is absolutely incorrect. With a null result, my paper may be mostly correct. Either way, physics needs a quantum gravity metatheory to guide experimental and mathematical physics. This paper describes how to developing such. The foundation prediction of my quantum gravity metatheory is that antimatter will neither fall up nor down in Earth’s gravitational field. Fortunately, CERN has been preparing the necessary experiment for decades.