Fun mental exercise ... baseball made $10.7B in revenue in 2019. If we take the Atlanta Braves financials (which are public) at face value, 2021 reflectes a 10% increase from 2019. So let's use a revenue basis of $12.0B (the actual increase is 11.1%. I'll simplify the numbers for math). Baseball's combined payroll in 2021 was 4.07B. So we're dealing with 33-35% of revenues going to the players.
Now, not all revenue in the NBA or NFL are subject to division - but let's assume that most of the revenue is revenue that should be shared with the players. Just for fun, let's call it $10B.
in the NBA, the players are guaranteed something between 48% and 52% of the pie, with the salary cap being set at 50.3% i think. So if we use 50% as the baseline "share", that means the leaguewide salary pool is $5B.
Divided among 30 teams, that would be a salary cap of $167M per team with a salary floor of $160M. There are numerous ways for teams to spend above the salary cap - but you can figure that out.