I think you mean 2021. I would like to think they would, but, until we know the numbers of people still going to the parks despite the current crisis then I wouldn't actually like to predict this with certainty. They are doing discounts for Florida residents, but, are they giving incentives to guests from the rest of the US?
I remember there being huge incentives when numbers fell after 9/11, even for UK guests, but, times have changed. I was due to fly out today and I am stuck at home itching to get back there once the travel ban is gone and it is safer. I doubt if I'm the only UK guest feeling like this. The money I would have spent on my trip is safely stashed away for that. Next year is the 50th Anniversary and it's going to be packed if this crisis is on it's way out, before this all happened I priced a trip with dates that included October 1st and the price of the rooms then were ridiculous, it didn't click as to why it was this expensive compared to this year, over £1000 more for identical dates. Then I remembered.
Even if there are discounts I doubt if resort rooms and park tickets will be cheaper in real terms. Those who will benefit will be AP holders and FL residents.