With Fox most likely leaving the Kings one way or another this way the Kings at least get something in return. Sacramento gets 7 first round picks all unprotected, 5 from San Antonio and 2 from Dallas whilst getting decent role players such as Keldon Johnson.
The Spurs need a real PG next to Wemby since Chris Paul is most likely going to retire after this season and De'Aaron Fox is the perfect player next to Wemby. Averages over 20 points a game and is a natural playmaker, they are perfect duo for years to come.
Dallas needs a starting SF or backup PF both things Keegan Murray can provide, Murray has had a down year leading to him shooting under 30% from three which has lowered his value. This is the Mavs GM (Nico Harrisons) style, buying low on players and Keegan Murray would be a perfect wing next to Luka because of his catch and shoot skill and defensive prowess. (Also upgrade Kessler Edwards to a normal NBA contract)
Mavs lineup:
Luka Doncic / Spencer Dinwiddie / Dante Exum
Kyrie Irving / Klay Thompson / Kessler Edwards
Keegan Murray / Quentin Grimes / Markieff Morris
PJ Washington / Naji Marshall / Maxi Kleber
Dereck Lively II / Daniel Gafford / Dwight Powell
Spurs lineup:
De'Aaron Fox / Chris Paul / Blake Wesley
Stephon Castle / Jaden Hardy / Sidy Cissoko
Devin Vassell / Julian Champagine / Harrison Ingram
Jeremy Sochan / Harrison Barnes / Sandro Mamukelashvili
Victor Wembanyama / Zach Collins / Charles Bassey
Kings roster:
Tre Jones / Devin Carter / Jordan McLaughlin
Malik Monk / Kevin Huerter / Colby Jones
Keldon Johnson / Keon Ellis / Doug McDermott
DeMar DeRozan / Trey Lyles / Olivier-Maxence Prosper
Domantas Sabonis / Alex Len / Isaac Jones