Hey Matt.
If you haven’t seen it already, check out the monthly mega resource thread: Zwift Resource Megathread - October 2022 🗺
There are a TONNE of linked resources and ideas for keeping Zwift fresh.
Coincidentally, this is my second full season on Zwift. Achievement and route badge hunting, the Everest Challenge, and friendly group rides kept me occupied for 5500km on the trainer last winter.