Even that isn't straightforward though. We are third, but Wycombe could quite persuasively argue that they have played a game less. However, they are 8th! Promoting them at the expense of any of the seven teams above them on PPG would be hugely bizarre but not taking that missing game into account would seem unfair. At the bottom, Tranmere are three points below Wimbledon but have a game in hand. Admittedly their goal difference is 11 goals worse though!
At the bottom of the Prem it's even less clear, with Villa having a game in hand but being two points behind three other teams.
BUT - in fact if you go through the divisions, most decisions (if the season were to finish now) would be relatively clear cut. I'll italicise the dubious ones.
Prem - Champions: Liverpool. Relegated: Norwich, Bournemouth and Villa (they've played a game less)
Champ - Promoted: Leeds, West Brom, Fulham. Relegated: Charlton, Luton, Barnsley - All teams in the division have played the same number of games. Current standings stand.
L1 - Promoted: Coventry, Rotherham, Oxford (Wycombe have a game in hand) Relegated: Bolton, Southend, Tranmere (they have a game in hand over Wimbledon)
L2 - Promoted: Crewe, Swindon, Plymouth, Exeter (Cheltenham have a game in hand) Relegated: Stevenage
So in fact out of the promotions and relegations (and there are 20 of them) - only four are arguable based on current standings. Tranmere haven't got much of an argument with their goal difference though, so only three contentious ones really. I'd suggest the big losers would be Villa and they'd fight it tooth and nail. For us and Exeter, then at least the teams that could potentially catch us would effectively just be left in the same positions they would be if the season was annulled.