Space pics to work. I see this benefiting all parties

Celtics get basically new team.

Mavericks get rid of porzingis while in the process get defensive guard to go with luka, traditional center to help anchor team along with defense. They also get great 3 and D prospect in Romeo Langford. ( Langford in the playoffs showed his ability to guard 1 through 4 along with his ability to shot 3s) they also get pick compensation.

The Pels get off a disgruntled star with great return.

Jaylen Brown being the centerpiece he is a great two way star who comes in at the same level as Zion. They also get elite scoring in fournier. Good 3 and D player in Grant Williams. And then 4 first on top of that. To help replace Steven adams and Zions Ability to rebound they get Tristan Thompson.

Then from the Pacers point of view they get a 1b in Porzingis who should play well of Sabonis. A young prospect in Moses Brown who is already a great backup center who would mature into a walking Double Double of the bench. Then they get Pritchard who has decent upside to be a quality NBA point guard as he has shown flashes of being an elite 3 pt shooter along with his hustle and passing ability could be a good replacement of brogdan. Then on top of that they get a first and two good players in Hart and Richardson. Richardson would come in right away and be a starter while Hart would be a. Great bench piece.

All in all i know this will never happen. But as a fan would love to see it.