FIFO?No, FIFO would mean you get to leave immediately after the game if you had to go in two hours beforehand. And I'm not saying that's the way it'll happen, but it's a possibility - otherwise fixed moments for each section of the stadium might be an option too, but if the toilets at OT are anything like those at Anfield, I don't think it's gonna be workable without breaching social distancing requirements.
If you mean first in, last out that would sti be almost 4 hours (not unreasonable, if you live close to the stadium) and that's if you can manage to get 10k people in and out that fast.
Then you'd also have to rely on people being able to queue politely, and as you can see with the beaches pictures coming out, I wouldn't want to surround myself with people who couldn't follow simple instructions while going through that process!
I think someone needs to crack VR for football.