Their special season is irrelevant at this stage, the entire focus will be on getting European football back on track as quickly & profitably as possible. I dont think anything will happen for the PL independently of anywhere else, Uefa will look to unify the calendars to manage transfer windows, major tournaments etc.
All I am saying (as per my very first point in this thread) is IF Football is ready to play circa Sept time & IF the decision is to play out seasons Europe wide, one thing that might happen is move the Euros again to November 2021, the same time of year as Qatar 2022 meaning you would have.....
Sept - nov 2020 finish all leagues across Europe
Jan - Oct - new 2021 season followed by euros
Jan - Oct - new 2022 season followed by WC
2023 & 2024 move back to the traditional Aug to May season
Again I am saying this could be a solution, not the solution