Actually, not a problem if we want to develop a long-term core for the 4-year cycle. I think Newsome, JB, and June Mar can still be useful until 2025 (anything after that is a bonus, if we're going to be completely honest). Scottie, Malonzo, Oftana, and CJ can play until 2027 at least. We have to gradually replace them as their game slows down.
Plus, if JB's gonna be the import, we need another center (unless if JB's gonna be our 3rd player at 5). And we know that June Mar and Kai are defensive liabilities with AJ out, so we need good defenders (good thing Brownlee is one). As for 4, Malonzo and JB can fill that position in, but as for natural fours, we need to look outside the PBA.