There are people around the league who are wondering if the Philadelphia 76ers are going to pursue a Joel Embiid trade after this season ends, according to Brian Windhorst of ESPN.
https://clutchpoints.com/sixers-rumors-rival-teams-starting-to-prepare-for-possibility-of-76ers-trading-joel-embiid/
If I were the sixer i would rather trade Simmons than Embiid, but the sixers front office probably knows something we don't.
Embiid is a weird guy, but talent wise, he is a top five player in the NBA today for most people and a top ten player for all who follow basketball.
Hawks can offer anybody but Trae. The principle trading pieces would be Embiid for the Hawks' unprotected 2020 first round pick and any other assets to throw in, maybe Clint Capela or somebody else.
Trae and Embiid and some decent coaching should make the Hawks into a top 3 team in the east instantly.