I know there are more important matters to consider but this is a football based forum after all.
This is all on the assumption UEFA will delay the European Championships to next year.
Personally I can't see how the season will complete between now and the summer.
Every alternate I am thinking of as below is riddled with flaws in them:
Something like they do in Argentina where they average out the position over the last couple of season or so.
Move the Cups until later in to next season (no way will they just not play them) and complete the last part of this season running alongside the current season whilst having an expanded Premier League.
Also every decision made about the Premier League has an impact on each league further down the line.
It's crap for the clubs that would win the league, be promoted and great for the clubs that would've been relegated but thinking about it all, declaring null and void seems to be the only clean way around it all.
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Putting this in Arsenal debate as it will have an impact on us of course too.