I would love this too! The 20th anniversary was the perfect opportunity to bring back the original Sims 1 neighborhood as a world (with neighborhoods named Sim Lane, Elm Street, Old Town etc). I would also love Magic Town in the Sims 4 - I miss that world so much. Fingers crossed for an updated version as part of a possible Happy Haunts GP..? The circus, the woods and the lot descriptions were so fricking good. One of my disappointments with Realm of Magic was that there was no séance/psychic themed gameplay like in Makin' Magic.
But yeah, bringing back some blank worlds as a nostalgic throwback to the TS1 ones would be really great.