We should not expect that all sports activities are going to start in a month.
There will be needed more time in order to let teams get trained and be on fit again.
Most of the teams cannot train their players right now and this will have a negative effect ot their performance.
You are right on that, but I am sure if the seasons resume we will see some tight schedules with games almost every three days. Honestly I doubt the national leagues will care much about if the players are fit or not. If there is a certain timeframe in which the season could be finished the games will be played. But you are right, it will take some more weeks until we can think about resuming the leagues.
I'd rather expect the season will be suspended because until now there is no certainly yet, corona virus is still staying and even longer more people are infected, what makes the games or any league to be successful are the crowd, without them, sports can't generate income.
Think of the fans also, not only the players.