I don't think the developers are bored or out of ideas.
I'll just copy this from another thread:
I'm all for a pack like this. Especially at this stage of the game's development. We've got the two most requested packs, Seasons and Pets, out of way. I think we'll get a university pack, a tropical vacation pack, and another occult pack, probably witches. I think the developers are now starting to speculate on new ideas to bring once those packs are released and are testing the waters to see how well this story driven pack is received.
And tweets from Grant.
https://twitter.com/SimGuruGrant/status/1098678358831857664
https://twitter.com/SimGuruGrant/status/1098678147455668225