NHL Revenue in 2018/19 - 5.08 Billion Salary Cap $81.5 Billion
Expected Salary Cap for 2020/21 was between 84 to 88.2 Billion, according to Daly... used the average, about $86 Billion, to extrapolate out, expected rise in Revenues. About 5.5%
So... expected revenues rise was about 5.5% is about 5.36 Billion in revenues, that the league was on pace to make, before the virus.
Approx 1399 games in the season, 1312 in Regular season, and on average 5.82 games per playoff series, with 15 series.... 87 games... 1312+ 87 = 1399
195 games weren't played, plus 87 playoff games... .. so 20% of the season was lost... so you should surmise, that only 20% of revenues lost...
But, you could argue the playoffs are worth more, and I"m not sure how much more, but let's just go with double value of regular season game....
So, 1312 regular season + 87 games times two... is. 1486 games. 195 RS games + 87 x 2 then divided by 1486 games value... and it's 24%...
There is no way that 50% of league revenue are gone for the season, so there is no probability that the players would agree to a 50% cut.... The lost revenues are somewhere in the 20-24% in all probability.
But, keep in mind the revenue was already going up... so if we go back to the expected revenue of 5.36 Billion, and substract either 20 or 24% from it... you come up with $4.288 Billion and $4.07 Billion,,
So that's a drop of 15.6% to 19.9% from last years revenues. Where Burke would come up with 50% is of pure fantasy.
What the league, and NHLPA decides to do, is to be determined, but it's probably prudent to keep the cap as is, with a much higher escrow.