Never heard that rumor about trading for LeBron James but right now LeBron James is still the cash cow for the Los Angeles Lakers which is why they can not get rid of LeBron James many want him to the team not because of getting the championship, but the money that LeBron will bring into the table for having him in the team will surely give the team boost in the money kid of thing the budget and salary for sure,
Lebron James is 39 years old and his career is not long anymore. with high contracts and salaries it will be difficult for new clubs to accommodate him. because there are salary cap rules, aka there is a maximum budget limit for each club that can be spent. so if there is a club that wants Lebron James, they have to sell or throw away their star players so that the salary cap spot is there to accommodate Lebron James.
In terms of having someone like him to their roster before his retirement is like some sort of history. But what most teams like to have history is to win championships. Each team has their own franchise and best player that they can have and give the salary cap.
While it is not going to give Lebron that much benefit but AFAIK, this is just a rumor and won't happen.