A version of the trade above:
Rockets - Brown, Rob Williams
Celtics - Smith Jr., OG, Van Fleet
Raptors - Green, Pritchard, 4th pick, 2024 Brooklyn pick (protected 1-10)
Rockets do this trade if they have a verbal with Harden. I think they then need to chase after a guy like Capella as well (should have the space). Harden-Brown-Porter Jr.-Eason-Capella with Martin, Tate, and Sengun off the bench. I think that's a fringe playoff team with Ime as a coach.
Raptors move toward a mini-rebuild after Nurse leaves. They land a top-tier shot creation talent in Green. Pritchard gives them value as a floor-spacer they desperately need in their lineup and gives them some upside at guard. They also get the 4th pick and the Brooklyn pick next year, which they can use to fill their roster with young talent around Siakim, Green, and Barnes.
Celtics replace their All-NBA wing with a solid point guard and solid two-way wing. They also get an upside big man. Admittedly, this is a great return to Brown, but I also think he's worth something close to this, and that the Celtics should not settle for anything less than two solid playoff rotation pieces and a prospect (or valuable draft pick).