I'm assuming (which doesn't mean much these days) that there's people within the company to help keep things moving along. If half of the houses are originals, they in theory could be kept up year over year (or rebuilt and save on the design cost/time). If the IPs are allowed to be kept to the next year in a year when they're going to have attendance fall off a cliff year over year, it could be a win/win for those who can't make it this year due to restrictions and for Universal to save $ when they need to.
With Epic Universe being delayed, I wonder if Mike Aiello will be helping out for next year. (sorry to being too much a stretch looking ahead, but just a guess given he's still on the payroll it seems.)