If it happens this season it will be more about building confidence in the effects of the vaccination programme rather than football and will be one of many similar activities e.g. rugby, cricket and festivals etc.
It will be small numbers 2k.
I don't see things getting back to normal i.e. 30k at the ground for a very very long time - years- especially if the all the games are offered on TV.
Personally I have not made up my mind because the things I love about going to games are having a few pints, being sociable and getting absorbed in the emotion generated and I can't see that happening for a while. On a more practical level the toilets will need to be greatly increased as standing 5 deep in an enclosed space has to be a thing of the past.
Not positive enough I know and hope to be proved wrong.
I too can't see full grounds for a long time. Maybe 2022/23 season. I wouldn't be surprised if the pandemic makes some people anxious about big crowds for good.