If the season resumes....

[WickfordO]

....in the summer, will it be done by the time the transfer window opens, or will the governing bodies either delay it or cancel it?

[The Mindsweep]

What about those who contracts end in May & June?

[POSHO]

It's a difficult one. The premiership elite players agents are looking at a bonanza on short term deals for the STARS. For the rest of the normal clubs, depending on the amount of players being out of contract, I would treat as normal. New contracts, resign or let go. Our club could field a team for 10 games

[point nine one eight]

....in the summer, will it be done by the time the transfer window opens, or will the governing bodies either delay it or cancel it?

The EFL will complete the league fixtures come hell or fire water

[RientO]

I reckon they will finish this season off even it it takes until December 2020.
Then they can have calendar year seasons (Feb - Oct) for 2021 and 2020. The latter ends in October 2022 just before World Cup in November 2022.
After that they can shrink seasons until 2026. Could shrink seasons a bit by removing League Cup. check a trade trophy, fewer rounds of international qualifiers. Knock out for UEFA competitions. No replays...