Dr. Eddies Wingman
Brighter than thousand_suns
A good option would be to suspend all the leagues in Europe for a couple of months and get them finished in summer with Euro 2020 postponed for a year. It would make pre-season pretty tight and would mess with the Champions League and UEFA Cup qualifying rounds a bit but this way everyone gets to play in front of crowds and all the matches take place.
If the epidemic has peaked and is on the decline by the end of May.