Those of us that come from out of state don't use house announcements as a factor in deciding on whether or not we will make an HHN trip. Room availability has been limited for months now, even before TLOU or ST4 was announced. Out-of-towners that hear about an IP they love and decide to plan a last minute vacation are very, very few and far between.
Announcements are exciting for us, but for the casual/general public/locals, an announcement in July for a Halloween event in September is going to be forgotten by the time the event draws closer. It behooves them to wait.