Crossover Cover: Star Trek: The Motion Picture

According to the novelization of the first Star Trek film, “The moon Io had held some shocks for the first Earth scientists to land there, although not nearly as shattering as the earlier discovery that Earth’s own moon had once served as a base for space voyagers (their identity still a mystery) who had conducted experiments with Earth’s early life forms a million or more years before human history had begun.” This is a reference to the unknown race that created the Monoliths in the movie 2001: A Space Odyssey. Since that film is incompatible with the early 21st century of the CU (or our world), the beings responsible for the Monoliths must have counterparts in both universe.