I hate rookies going into their 2nd years as any answer to a most improved question fwiw, 2nd year players are just supposed to improve.
Anyways the 3 that come to mind for me are OG Anunoby, Marvin Bagley and Jamal Murray.
Murray were seeing glimpses of stardom during this playoff series vs Utah, if he can retain some semblance of consistency he’s about to make that leap into stardom and become a really good player, so he seems like a good bet.
Bagley I like because he’s gonna have plenty of time to finally get healthy. He’s shown some glimpses of being pretty special when he’s actually able to stay on the court and the Kings really need him to breakout this upcoming year, I think he’s going to put a lot of work in, get his body right, and prove he was worth a top pick.
OG I think we’ve seen flashes of potential from recently as well, where you just think man if he can just work on his handle and his shot in the offseason, he could be a legitimate 2 way star in this league. Toronto’s pretty great at developing players and I think he can have a Siakam level ascendence.