We will already have guaranteed contracts to Hayward, Horford, Kyrie (if resigns as expected), Smart, Tatum, Brown, Baynes, Robert Williams (8 players). We have team option for Semi at half the price and is already a better player that we should exercise over Yabu (9 players). We could have three first round draft picks this season (up to 12 players). Rozier, Morris, and Theis could be resigned with bird rights (up to 15 players).
I don't know that we'll have all those players and draft picks next season, but we will probably bring several of them in and might find some MLE or BAE players available that are better than Yabu. So I'll say unsure. I'm not feeling so confident that Yabu is ever going to be a rotational player in the NBA.