I would expect the airlines to ad hoc create a reduced master schedule in the interim until capacity is restored. They do this for major holidays, but many months in advance. Here they will be doing 72 hours in advance. Flights won't get "cancelled" they'll be NOOP (Not Operating) which is different. As an Ops Chief, this is heaven (while losing money). Tons of spare planes available. Lots of time to work on backlogged maintenance on the planes. Major headache is parking: it's not easy to have too many idle aircraft for a sizable carrier. Stowing them overnight becomes a choke-point.