Remember this is what the Sims team said when they introduced the roadmap:
"The team has also been hard at work on some new surprise additions we plan to bring to the game over the summer. They are not massive changes, but they are pretty cool ones that I think you will have a ton of fun with."
My speculation is:
Just like they brought back firefighters maybe the addition of npc burglars with the addition of an alarm system.
-The ability to recover tombstones when not playing that household/the comeback of mausoleums ( when placed down all tombstones can be accessed once a Sim dies and maybe Sims that were marked as a played household won't be culled)
-Small pets (e.g. lizards & snakes)
-unlocking unnatural hairstyles so you can choose whether they're genetic or not *especially for occult Sims*
-Or maybe objects added to the game like they did with baby Yoda for example.
What do you guys think?