I would expect the first couple of games at PL will have between 500 and 1000 fans owing to 1) no football (euro champs will have finished, and L1 season not started) and 2) I'm guessing Wimbledon ST holders will get a large discount to the games. However when football starts, I see attendances less than 500, and even if they make the playoff's (which is 50/50 at best, considering you have Tolouse, Fev, Bradford, Fax, York all superior to us, so it really comes down to us vs Batley / Sheffield / Newcastle for 6th place), in 6th the playoff game would be away anyway, so you would not have a Playoff game at PL to get in any fans....
The real question is going to be how much effort will they make after the disaster of 2021, to try and get fans to come to 2022 season.
To me it really feels like the whole strategy is to hope that wimbledon fans will attend on mass. I really cannot see it,and with no plan B, there is no coming back from this one