https://twitter.com/AlexKennedyNBA/status/1142253107436556289Thad Young has started 162 games for Indy over the last 2 seasons and averaged over 31mpg. That's a pretty good indication Nate McMillen likes him. I'd expect they'd retain him.
https://twitter.com/cliffWISH8/status/1141822110526005249
https://twitter.com/GrantAfseth/status/1141921540734193664
He could be back, but all indications seem to be that they want Sabonis to play the 4 more, and they are focused on Bogdanovic, I'd guess Thad gets a better offer elsewhere and they wish him well