The question Does this organization still exist? was closed, with a voter citing the future works policy. However, I fail to see how said policy applies. The question is not about a future work, it's about the backstory to a released film. Not currently having a definitive answer (which is not certain in this case) is not the same as being about a future work, and as outlined here, is not a valid reason to close the question.
Disclaimer: I don't know anything about the Marvel universe. This is a general discussion of the future works policy.
I think there's a continuum of different types of question to be considered here.
At one end of the scale we have questions explicitly about future works. If someone asks now about what will happen in Star Wars Episode IX, that question should be closed under the Future Works Policy and reopened once it's answerable.
At the other end of the scale are questions with unknown answer and closed canon. If someone asks about the state of the realm in Gondor a hundred years after Aragorn's death (I'm trying to think of a LotR question which isn't answered somewhere in the massive canon!), then the answer might be "we don't know", but that's not enough reason to close, and it would also be unreasonable to close under the Future Works Policy as there's no reason to think any further canon is forthcoming.
In between these two extremes lie questions with unknown answer and incomplete canon. If the answer to a general question about some universe is unknown now, but might be revealed in a future work set in that universe ... well, that "might" is where things get sticky.
Sometimes it might be very clear that the answer will only become known after the release of some future work. If you ask about the backstory of a character appearing in the first book of a series, and it's clear from how the book ends that that backstory will be revealed in the second book ... then I could see closing the question under the Future Works Policy.
Sometimes there might be no reason to believe that the answer will be revealed in future works. Take this question, for example: What is the Doctor's real name? The answer is unknown, and could in theory be revealed in a future episode, but given the role the question plays in the story, I very much doubt it. (Pertinent information has been revealed in new episodes as the show goes on, though, and this has been edited into the accepted answer as appropriate.)
Where disputes arise, then, is when people disagree on how likely it is that the answer will be revealed in future works. The thing about the future is that we never know for sure what will happen there, so there's often room for debate. Without knowing anything about Marvel, I think that's what's going on with your question: the close-voters think the answer clearly lies in future canon, while the reopen-voters think that's not so clear and the question can be validly answered from current canon.