Giannis, Lopez, Holiday, and Lopez are all under contract together the next 2 seasons. Lopez is a FA after that and Middleton has a player option for the 2023/2024 season.
Pat C and DDV are under contract next year and Pat C has a player option the following year and DDV has a qualifying offer the following year.
Forbes and Portis have player options this upcoming year and will be interesting to see if they opt out. Portis can make a lot more money elsewhere. Forbes plays zero D but is a reliable 3pt shooter.
Ideally, they both opt in and Tucker comes back and they run it back one more year. If a Nwora can emerge, this team should be really good again in 2021/2022.