Funny I made a HRH reservation for my birthday for the end of October and beginning of November yesterday and this had happened today. I was still on the line on whether I would be going, or not to the event, (mainly was planning on just relaxing and spending time at the hotel) so not too disappointed, but I know plenty of people that are and my heart goes out to them. It'll be interesting to see if the parks in general stay open.
At the moment, their reasoning is to focus on the day to day operations. However, it can close at any moment, considering I saw a photo of the outside of the HHN 30th tribute gift shop and saw something about casting scare actors last week on instagram, so I feel this was a sudden decision.