Collaboration stuff packs?

The only stuff packs I'd buy at all would have themed content like Harry Potter or Game of Thrones. I'm not fussed about regular clothes or furniture brands at all, and haven't bought a stuff pack since Sims 2, though I did buy a fair bit of store content in Sims 3, but those weren't branded.

Depends on which brands and the content of the pack. As far as H&M and IKEA packs are concerned: I really liked the H&M stuff in sims 2 but IKEA was the only pack out of the entire sims 2 franchise which I never bought.

Packs themed around TV-shows could be interesting too, especially Harry Potter and Game of Thrones. But there are also some TV-shows I'm not interested in. So I think this formula could only work with shows with a big fanbase. I would be thrilled to have a Lord of the rings stuff pack. Or Star Trek.

The only colabs I absolutely refuse to buy are celebrities. I don't follow any celebrities and I'm not interested in their stuff either.

While I like the idea personally I'd rather they focus on stuff fans have been asking for ages, like an update on babies or cars. I would like a wedding pack though so maybe they could collaborate with a company that makes wedding stuff, idk I don't follow irl stuff much.