How to deal with questions which are related to parts of a movie which are going to be released in the future or the suspense created by a movie/TV-series to be revealed later? Like this question, which asks a question about an incident which is added in end of the first movie of a series, for the sole purpose of creating the suspense. As of now, only the writers and directors know what is going to happen. Other people can only speculate which leads to opinion-based answers.
Shoud we mark them as opinion-based questions?