Aren’t code names assigned randomly?
I don't know about that.
One of my faves was the NJ State Police investigation of prostitution at a Dunkin' Donuts shop.
They called it "Operation Extra Sugar".
Code names are somewhat random but if operations are related the code names will also have a relationship. In a program I was in, we had programs with code names related to high school themes. So it was easy to tell if the programs had some relationship to one another.
I don’t think it is unreasonable to use code names related to a movie but it is unreasonable to expect any relationship between something in the movie and the actual operation.
I will make up an example: Take the movie Wizard of Oz. One program could be called “Wickied Witch” and a related program could be called “Toto” but these would not tell anyone something about the programs except for the fact that the code words put them under perhaps the same branch office of the government.