Earlier, The Sims Team alluded to the possibility of existing packs for The Sims 4 getting improvements and updates. Today, the official The Sims Twitter account confirmed this.
https://twitter.com/TheSims/status/1427649432196108293
The tweet promises some updates to an existing game pack as well as a new kit before the end of the summer. So far, the game pack getting the update hasn’t been officially revealed but we have strong suspicions that it will be Spa Day, based on some key phrases like “refreshing” and “relaxing” being used to describe this pack update.
Keep checking back with Sims Community for all the latest Sims news as it happens!