Outright betting markets

So in the event that corona wipes out events, what is going to happen here? Obvious answer is 'refund all bets' but think it is going to be more nuanced.

I have loads of these ongoing, Champion's League for instance where some of my teams are already out. Would the losing bets be refunded as there was no winner? Any idea about Premier League if they decide to force relegation on some teams?