In this scenario, the Pacers FO opts to keep the defensive presence of Myles and move Sabonis to a team that could use an upgrade in the skills department at the PF/C spot.
Why Pacers do this: Keldon Johnson slides naturally into the starting lineup of a team that already has plenty of interchangeable parts 1-4. Sabonis is a proven commodity and gets them a FRP. Poeltl is different in style than Myles offensively, but still provides the shot blocking presence to the 2nd unit. The Pacers also free up space to re-sign McDermott and McConnell.
Pacers new rotation: Starters - Brogdon, LeVert, Johnson, Warren, Turner Bench - McConnell, JHoliday, McDermott, Brissett, Poeltl, Sumner, AHoliday
Why the Spurs do this: Sabonis would give San Antonio their best skilled big man since Duncan. LMA was a shell of himself there. Sabonis' youth, team-friendly contract and length of contract all give the Spurs a frontcourt identity for the future. The Pacers drafted Bitadze right before the Spurs would have likely pulled the trigger. His career trajectory has continued to point up as he's been given more opportunities to play. The Spurs are notorious for divvying up their minutes to reduce wear and tear. So Goga will see enough court time to show off those 3 and D skills. Both big men elevate the frontcourt not just for now but for at least the next 3 seasons. They still have enough cap to make impactful free agency moves. Perhaps DeRozan, Gay and Mills.
The Spurs new rotation: Starters - Murray, White, Walker, DeRozan and Sabonis Bench - Mills, Gay, Bitadze, Vassell, Samanic, Eubanks