They may not have a season with spectators. (The beginning of the season almost assuredly won't start with fans in the seats.) They (The owners) are going to try to delay the season by any means necessary to limit payroll without fans. There are already rumors of owners unhappy with starting on time-- those whispers will become shouts as they get closer to Spring Training.
They'll look to cut costs in any way possible. (Cincinnati, among the most, I'd suspect.)
That may mean going into Spring Training will several open 40-man roster spots. (Krall will spin it as being "open" to what might be out there.)