Most viral mutations result in a weaker virus. Also they will assuredly have a vaccine within 12 months because their is too much money to be made and Corona virus's have been around for a long time. People don't seem to realize that our current society is unsustainable. The cascade you refer to would not just effect Disney but every industry in the country. The result? A greater depression that we willingly brought upon ourselves. To summarize, the cascade / depression won't happen so I don't view those as "significantly possible" but I respect your opinions.
Companies need to make money, these restrictions will start to disappear or be reduced in all industries before years end.
I've made these same points a few times in the past. I got my head chewed off when I tried to point out the virus mutations result in weaker viruses and in some case the disappearance of viruses (this point specifically towards RNA virus, which Coronavirus is, as opposed to DNA based viruses). People also fail to recognize the fact that the government is pushing for a vaccine to be available end of 2020. Production has already STARTED and they are just waiting to complete the trials so once the trials are complete there will be immediate shipping and delivery of the vaccines (instead of waiting for the trials to end and then start manufacturing). Fauci himself has acknowledged this fact. The point is the government (all governments) recognize the current society we live in is absolutely unsustainable from multi standpoints, particularly an economic one. A vaccine, regardless of how efficient or potent it may be at curtailing the virus is essential to get the population's mindset back to normal and at ease. And I fully expect that we will need multiple vaccinations if not annual vaccinations to account for the inherent characteristics of the Corona virus family. Again, people forget that we've been studying Corona Viruses for quite some time and although this is a new strain, we still have enough background and data to engineer a successful vaccine in record time. Yet the media keeps presenting the possibility of a vaccine as iffy at best despite governments investing billions in their production already behind sound science. The consequences would be a lot more dire if this was a brand new virus that we've never seen but that's not the case. Come spring 2021, after cold and flu season passes and the vaccine has been circulating for a few months, we will be in a much better place and so will Disney and the rest of the travel industry.