Wano may be over but many loose ends were left.
Zunesha was the original Joy Boy's nakama, and was cursed to continue living until the next one comes along. So Carrot ruling Mokomo Dukedom will certainly play a part in the future alongside Luffy.
Yamato stayed to keep Wano and Momo safe, and Momo is also related to Zunesha, as he is the one who can control them. So Yamato too will play a part in the future alongside Luffy.
Also, the ancient weapon Pluton is burried somewhere in Wano, and surely someone will want to take control of it soon enough.
So we're not done with Wano in the least, only taking a break.