Lebron signs with Cleveland, alleviating the need for Harden (who accepts his PO). Celtics trade for a much-needed ball handler, a lob threat and defensive anchor, and a super charged 3-D player in Trey Murphy. Pels get the firsts they're looking for from the Celtics for Murphy
Cleveland runs out Mitchell, Lebron, Mobley, Jaylen, and a shooter (probably Strus). Bench is a little thin but will have a couple decent ballhandlers in Schroder and CPJ.
Boston closes the JB and JT saga and sends out a starting lineup of Harden, White, Tatum, Allen, Murphy. Bench remains solid with Pritchard, Hugo, Scheierman and Queta. Personally, I think this makes them the deepest team in the league.
New Orleans gets off the Trey Murphy contract and gets back 2 firsts. This leads to the ultimate rebuild, probably leading to Zion moving next year. (Hauser and Garza are contract fillers)