The extending the season option will depend on whether Euro 2020 (2021) goes ahead this year! First game is scheduled for June 11th.
I notice the football World Cup for 2022 is programmed for November 21st to December 18th next year so perhaps Euro 2020 could be played next Summer 2022. I can't see the point of a tournament like this being played behind closed doors this summer and judging by the forecasts with Covid and the various vaccines it would be reckless to go ahead with mass movements of peoples across the continent supporting their side. Presumably with ticket sales, flight and hotel bookings, preparations generally a decision will have to be considered very soon.