User blog comment:RRabbit42/X, later Y antagonists/@comment-26884760-20170115183023/@comment-961279-20170115184124

That's true, but at that point, the game or movie is still in production and anyone that gets to see it usually knows they are not seeing a finished story. This is typically accompanied by signing a non-disclosure agreement which lists finanacial penalties for releasing information about what they see. But changes are typically made be re-editing it with existing material or by going back to film/create a new scene. Both of these add to the expense of the game or movie.

As part of the general public, we don't get that advanced look. We see it when the novel is sold in bookstores, when the game is sold in stores, when the movie is released in theaters or when the TV series premieres on a network. That's the point where it's finalized for the general public.