Random thought:
Several of the game packs (and just looking at game packs, don't get me started on expansion packs) could easily get refreshed and updated.
So... why does it have to be just one game pack getting refreshed? I know they are focusing on one game pack at the moment but it is completely possible that this "one announced refresh" is the potential start of a bigger effort to not just update the game packs but some other elements involving the expansions packs. Maybe they will go as far as to do something REALLY REVOLUTIONARY and update the amount of traits we are given to five. (and adding more likes and dislikes.)
That said, I would love to see "Dine Out" updated. Actually, I am not sure if some of the updates that I would like to see would be related to "Dine Out" or another pack.
Spoiler Alert: I want to see the food stalls automatically populate with a vendor on commercial lots. It really kills the immersion having to have the Sim pay to hire a vendor when visiting a lot. It makes doing an outdoor "food truck area" in a park next to impossible.
I suspect we will see either "Spa Day" or "Outdoor Retreat" updated. Which honestly... I am curious and somewhat eager to see. While I use elements from the "Spa Day" pack on about 90% of my builds, I barely do much with the game play. Oddly enough, I do more with the Spa Day pack gameplay wise than the "Outdoor Retreat" pack. So... yeah... if those are the packs then I am intrigued.