If beating the Warriors the next three our four year is LeBron's number one goal in finding his new team, Boston would be his best spot. 3-6 in the Finals has got to grind on LeBron, and losing that many times in the Finals will be what will hold him back from consensus that the's the GOAT when he retires. Three or four-peating to get his Finals record to 6-6 or 7-6, with three more Finals MVPs, and the narrative changes to "He has as many championships as MJ, and managed to drag some horrible rosters to the Finals, something Jordan couldn't to for many seasons until he finally broke through with a good squad."
LeBron can leave the Cavs for no compensation. If the choice for Cleveland is LeBron signs with the Lakers for nothing, or LeBron signs with Boston for Hayward, the 27th pick, and Boston's 2020 pick, which one are they taking?
If Kyrie isn't down for a reunion, then the Celtics would have to find a third team, one that can give the Cavs some quality without more than one bad contract. The Knicks could be that team, since they would have a chance to re-up Irving. LeBron to Boston, Kyrie to NYK, Kanter (2 year deal at $15m/year, a nice expiring piece next offseason) Morris, Yabu, Rozier, the Knicks 9th and 36th pick in this draft. If the Cavs find real players at 8 and 9 in the draft, their rebuild will be on its way. Tank the next couple of years while LeBron's overpaid supporting cast slugs through the rest of their bloated contract, and the Cavs will be relevant in 2121 if they draft wisely. The Knicks would certainly take a chance on Kyrie possibly being a rental for this package.