I was assuming it was a reference to aliens because there was also alot of hints here and there of aliens. Like: Vykker's Labs using the beam under the Lab to abduct specimens, they perform numerous experiments of lifeforms for no explained reason, they look like traditional aliens(short with large brains and gray skin), etc.
The saucer shape comparing cloud city your right about but the other stuff seems like too much to be coincidence :/
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