Logistically the easiest thing would be to invite all teams to camps near a location with few good stadiums and play CL in a different format - quick and continuous knockout.
I think that's what they should do and play it as some sort of tournament within a month or two after the domestic leagues have finished or something. All teams fly to a neutral county and play all the games in the same ground or two. You probably don't need to play both legs then either so that will cut the tournament down by half. I think it will have to be done something like this as organising pan-European matches is much more difficult than the domestic games if they even get going anytime soon.
Looks like Option 3 (closed doors) is all but confirmed to be the way to end this season across Europe, according to the European League dep SecGen, quoted by BBC today.
He also says "a small number" of countries are considering a cancellation, but also: "There's no doubt it will be behind closed doors".
It's much easier to void the smaller leagues where there's not that much money involved. The lower leagues have already been quietly cancelled in England.
People, what do you think of this:
"A Newcastle United takeover has moved a step closer after new documents show owner Mike Ashley has entered into a charge agreement with potential buyer Amanda Staveley."
https://www.bbc.com/sport/football/52284645
do we have a new project like Chelsea or Manchester City? Top six going to be top seven
Why would Newcastle be any different than they are now? Mike Ashley is a billionaire. He is a tightwad though. It's also much harder to buy teams and just throw a load of cash at them and make them succesfull with all the financial fair play rules they have post City-buyout.