The Sixers next season begins next week with the NBA Draft on June 26-27. As of now, the Sixers have the 16th and 41st picks.
ESPN Mock has them taking Jared McCain, PG, Duke at 16 and Pelle Larsson, SG, Arizona at 41.
Free Agency begins on June 30th. The Sixers have only two players under contract (Embiid and Maxey) and they will be trying to add a third star, either through free agency or by trade. They are openly rumored to be interested in Paul George. I'm not opposed to George, there are some problems in that he is often injured (more that Embiid) and he will be 34. However, he might be the best available free agent, and he costs only money. I would be more interested in trading for someone like Mikal Bridges, a younger quasi-star to complement Embiid and Maxey.
As for the 76ers own free agents (Hield, Lowry, Oubre, Covington, Bamba, Harris, Martin, Payne, Batum, Melton), it might depend on who they acquire via free agency or trade as to who they will bring back. I would like Oubre back if the cost is not prohibitive. I have some interest in bringing back Lowry, Payne, Batum and Melton. Obviously Hield, Harris and Bamba are gone. Reed and Counsil, Jr. are on non-guaranteed contracts.