The likelihood of finding a universal theory that explains all known physical laws is difficult to determine with certainty. As of now, our understanding of the universe is described by multiple theories and frameworks, such as general relativity (describing gravity on large scales) and quantum mechanics (describing the behavior of particles on small scales). These theories have been highly successful in explaining and predicting a wide range of phenomena within their respective domains.
However, there are fundamental discrepancies and limitations between these theories, particularly when trying to reconcile them in the context of extreme conditions such as the early universe or black holes. The quest for a theory of quantum gravity, which unifies general relativity and quantum mechanics, remains one of the major challenges in modern physics.
While physicists strive to discover a grand unified theory or a theory of everything that encompasses all known physical laws, it is important to acknowledge the complexity of the task. It is possible that a single, all-encompassing theory may be elusive, or it may require paradigm-shifting breakthroughs and new ways of thinking.
Nevertheless, scientific progress continues, and researchers are actively exploring various approaches, such as string theory, loop quantum gravity, and other candidate theories, in the pursuit of a unified description of the universe. While we cannot predict with certainty when or if such a theory will be found, the scientific community remains dedicated to advancing our understanding of the fundamental laws that govern the universe.