C: KAT - no brainer here. Best player in the league for the next 5 years at least
PF: Joel Embiid - Not a ton of great PFs in the league, and I think Zion is the only obvious contender for this spot. Embiid came in with high potential at 22, so he shouldn't be dying any time soon, and he's definitely the best PF in the league right now. This could also be someone who isn't the league yet, but that feels risky to bet on.
SF: Anthony Edwards - He took a step back this year, but he still has all the pieces to be an elite wing. If he doesn't use his potential, he could flop, but he has enough TCs that luck is on his side.
SG: Luka Doncic - I know he's currently a PG on the index, but long term he's a wing unless his handles get way better (in which case he'll be the best PG, and maybe the best player in the league). After breaking out this season, there's no reason he can't be a 30 PPG scorer in the future if we continues to improve.
PG: Tyler Herro - We now know that he has 80 pot, and he's already an excellent shooter and reliable passer. He feels the safest to best on of the available options. This is a tight race, and it hurts me to not list Fox here, but Herro is a better shooter and has higher potential.
6th man: Ayton - Another no brainer, he's the second best player in the league