The people in sci-fi movies who transmigrated to another world were not necessarily Superman. Superman is a fictional character that appears in many science fiction novels and movies, often depicted as an existence with superhuman strength and abilities. However, Superman wasn't a real species. He was just a fictional character that couldn't be directly compared to the real world. If the characters in sci-fi movies transmigrated to another world, they might become other fictional characters such as aliens, creatures from another world, and so on. The abilities and characteristics of these characters might be different from those in the real world, but they were not necessarily superhumans.