Just few weeks ago we didn't even thought that such scenario is possible, but now most of sports leagues and competitions around the world is stopped and future of it is very questionable.
From what I see, competition in Europe is still going on in Turkey, Russia, Serbia, Belarus, Ukraine, some Asian and South American countries, most of Africa and Australia. It's probably first time since WW2 when most of competition were forced to stop. It will definitely cost lot of money.
What really will be interesting is the amount of money in sports. As we all know teams pay these players according to how much they make as well. Now that teams in almost all sports will play a lot less but contracts are already out there, I am pretty sure it will be reflected some other way. NBA teams even will pay for not played games for hourly workers let alone others, so people who are hourly will get paid even when they are not working, that has to come out of somewhere. I suspect there will be a lower cap space for next year as well.
There will be huge impact in terms of money. In my country, basketball league made very strange decision - they ended championship in the middle of season and announced champions. It means that league and clubs will get less money from sponsors, less revenue from TV rights. It's force majeure situation and it means that clubs will not pay money to players for remaining months of season...