First of all, Harden leaves Philly. From the viewpoint that Chicago wants to move his roster on the way to give more protagonism to Zach LaVine, and Philadelphia is looking for a trade for Tobias Harris, they might be traded. In addition, Philadelphia gets Gary Trent Jr for SG position (moving Tyrese Maxey to the PG and giving him more ball and minutes); Brook Lopez may accept an offer from the Sixers after Bucks´ disaster on the PlayOffs first round. Lopez would be the main C, and Joel Embiid could be moved to the PF position.
Philadelphia would start the 2023/24 season with this roster:
PG - Maxey - Melton.
SG - Trent Jr - McDaniels.
SF - DeRozan - Niang.
PF - Embiid - Tucker.
C - Lopez - Reed.