The Ohtani contract had me thinking about what a ten year Lebron contract would have been in 2010 with no salary cap or max contracts. His impact is so much greater than a baseball player but the NBA doesn't bring in enough revenue to offer a player $80M per season... I think.
The NBA pays significantly more in salary ($4.8B) than MLB ($3.4B), despite having a salary cap. The average NBA team will pay about $161M this year, compared with about $114M for the average MLB team, and taking into account how many more MLB players there are, the average NBA player makes far more than the average MLB player (it looks like the average NBA player makes just over double what the average MLB player makes, but I haven't dug too deeply). Additionally, it looks like NBA teams are worth on average 50% more than MLB teams - I have no doubt that if there were no salary cap and no max contracts, teams like the Lakers, Clippers, Warriors, Knicks etc would have payrolls north of $300M.
If you dropped 2010 free agent Lebron into the current salary climate, he'd get 9 figures annually (especially if he chose short term deals over longterm security, which has been his MO since leaving Cleveland the first time).
*edit - I feel like this isn't debatable...Jaylen Brown (Jaylen Brown!) just signed a deal that gives him more annually than any MLB player outside of Ohtani (and in the last year of his deal, he'll be only $5M behind Ohtani). There are 11 other NBA players that make more annually than any non-Ohtani MLB player. Forget 2010 Lebron, if Jayson Tatum were an unrestricted free agent next summer in a league with no max salary and no cap, he might get a deal that's worth more annually than Ohtani's.