My 2cents worth, what most consider "normal" will not return after this is over, at least for quite some time.
Firstly, not every country will emerge from this disaster at the same time and there maybe a second wave making authorities very nervous about which restrictions they lift/impose a various junctures. Various stop/start measures.
Secondly, many businesses coffers will be at an extremely low ebb and human ingenuity being what it is within a couple months of lock-downs, devising ways of operating without having staff flying all over the place will have been implemented through necessity. The much forecast ubiquitous internet WFH dynamic (and much delayed for the last 15 years through habit & procrastination) has been force-ably introduced in a rush and will most likely settle down quickly after a few teething problems and become a new norm. Businesses still operating will see clearly over coming months the reduction in office space requirements and associated costs and general changes in their overall ways and costs of doing business.
Thirdly, even if the economy does fire up a bit in 18 months time, many people at a personal level will come out of this mess with significantly less finance resources than they had before (or even no job), have increased mortgage or rental payments to make up for negotiated deferrals, and/or reduced super balances plus additional tax burdens imposed for the guvment to recover significant outlays due to various rescue packages and increased dole payments. etc
Fourthly, some people will feel burnt by the current dilemma of being stuck overseas, flights and bookings cancelled all over the place, holidays aborted, lack of refunds, enforced quarantine measures, increased costs of travel in a smaller less competitive market and not be so emboldened to travel as they were before.
My forecast is the aviation landscape will look significantly different for at least 2-3 years, if not for the long term.