life or consciousness spontaneously arising, the conditions that allowed life to emerge in the first place were extremely specific. Life as we know it arose from billions of years of chemical evolution under unique conditions on Earth—right elements, energy sources, and an environment conducive to complex molecule formation.
For life or consciousness to arise again, those specific conditions would need to occur in exactly the right way. While the universe is vast, such conditions might be exceedingly rare. Additionally, the environment you were born into—the cultural, genetic, and social factors—was incredibly specific and unlikely to be replicated.
Philosophically, if you mean the "essence of you" spontaneously re-emerging after death, that seems less likely. If consciousness is a product of the brain's complex activity, once your brain ceases to function, your specific pattern of thought and self-awareness disappears. Even if similar conditions occurred somewhere else, it wouldn't necessarily recreate you.
That said, the universe operates on probabilities, and some people speculate about endless cycles of existence, multiverses, or quantum events making the re-emergence of life (or something like you) possible in some form. But scientifically, there's no evidence to suggest you'd consciously experience this or that it would involve "you" as you know yourself now.
the "problem of personal identity" and the nature of consciousness. If "you" were reconstructed atom by atom, exactly as you are now, it raises the question: would this new version of you actually be you, or just a perfect replica?