If there's a question that requires the sort of expertise we have here, in addition to some legal expertise, then yes. This is just the same as a question that wants both physics expertise and knowledge of science fiction, or history and fantasy, and so on.
I dislike that specific question, because there's nothing in it that's particularly about science-fiction. You could substitute Saturday Night Fever for Star Wars and the question wouldn't really change.
However, the same applies to a question like this, and there wasn't any disagreement about that (my recollection was that these were not on topic, but that's not what the meta post shows, unless there's another later one that I didn't find).
The copyright question is also rather "general reference"-y, since a web search for "star wars copyright expire" finds the answer easily. If the question is more "does revising a film renew the copyright", that's not really general reference, but there must be plenty of films outside of science fiction & fantasy that have been revised, so I still don't see why you'd ask it here.