I like to believe that there's some secret Cabinet of Hentai Officials who watch incoming media like a President and their administration watches out for threats.
Secretary: Mr. President. We believe that in the presentation for Sword and Shield, we will see the reveal of a new Waifu Class.
President: What's the Tier?
Secretary: Mid to high is our estimate, but there won't be any reveal about her characteristics besides what we will see in her appearance.
President: Understood. General, when can we see the first picture go up?
General: Before people even think about tweeting about saying that they wouldn't be surprised if porn exists of her yet.