Honorable Mention: Lakers
Pistons getting a possibly fully healthy Cade + Top 5 pick
Raptors will be off to a much better start next season with the addition of Poeltl
Rockets are getting better and better every couple of months. The addition of a top 3 pick will put them over the top.
Thunder are doing amazing without Chet, When Chet comes back they'll be a scary team.
Magic have 2 first and a ton of options to get elite talent, via trade or draft.
Spurs potential Top 5 pick + the rise of their young core should give them a much improved record next season.