I think there's a strong possibility we'll see a cancellation of most fixtures in the International calendar, particularly non-competitive ones. The club Football schedule will need to be prioritised to ensure that next season starts and finishes within a reasonable time frame, if they cancel most international breaks throughout the season, that will allow for more club games to be played.
However, as has been said multiple times, this current season is just as important as the next, which is why the PL and other leagues are prioritising finishing the leagues when it's safe to do so.