Toronto:
The Raptors are interested in acquiring Tyler Herro (MIA).
The Raptors get to offload the contracts for Pascal Siakam and Otto Porter Jr.
Otto Porter Jr. has negative trade value, and he is a relief for the Raptors to trade.
Finally, the Raptors get a few young talents (MIA), 2 picks (MIA & ATL), and $11M of cap space.
Atlanta:
The Hawks are interested in acquiring Pascal Siakam (TOR).
The Hawks also acquire Otto Porter Jr.
The Hawks get to offload the contract for Clint Capela (TOR), so they can start Onyeka Okongwu instead.
The Hawks will also have to trade De'Andre Hunter and 1 pick. Losing him is the only downside for the Hawks.
Miami:
The Heat are interested in Damian Lillard (POR).
Additionally, the Heat will acquire big man Jusuf Nurkić (POR).
In total, the Heat will have to trade 4 players and 3 picks.
Portland:
The Trail Blazers will lose Damian Lillard.
In what is considered an upgrade, the Trail Blazers will acquire Clint Capela (ATL), in a swap for Jusuf Nurkić.
The Trail Blazers will also acquire the starter, De'Andre Hunter (ATL), and the veteran/champion, Kyle Lowry. The latter can be a mentor to Scoot Henderson.
Note:
This is a better trade for Portland than having Tyler Herro, Duncan Robinson, and 3 picks from Miami. Jimmy Butler, Bam Adebayo, and Caleb Martin cannot be traded if the Heat plan to win a championship next year.