We have had a long-standing policy that questions asking about material from unproduced future works should be closed until such time as they are answerable.
The meta consensus was that we should close them as primarily opinion-based, which is as close to a legitimate reason as we can get. But it isn't really right -- in many cases, these questions do have objective answers, we just can't know them yet.
Even worse, people are not consistent with the close reason they use, since none of them actually specify "future works". We get them closed, for example, as "off-topic" or "too-broad" as well. It also shows up repeatedly in the list of custom close reasons people type in for off-topic questions. For example, of the 14 "custom" close reasons this month, 10 of them are "future works".
Do we have room to add in a custom close reason for this -- one that not only specifies why the question is being closed, but also links to the meta discussion, as well as reminding people that the question could be reopened in the future?