(Just FYI: Dancing can't be one of the new skills with Jungle Adventure as we already have that as a skill from Get Together.)
What we know quoted directly from simsguruninja's (Dave Moitke) tweets:
https://twitter.com/SimGuruNinjaSelvadorada is another holiday destination world (as is Granite Falls)
There are assorted local Selvadoradian villas to rent on the outskirts of the dense jungle. They're warm, furnished places. Almost like you're using Airbnb to stay in someone's real home
Yes you can adventure with others. Your own household sims, other NPCs, toddlers, kids, pets… you name it.
Skeleton-ism (that's a term, right?) is an affliction your sims endure. You can't create them in CAS
Harvestables? plural? Fish types? plural? Why yes. Yes to all.
Correct. Layouts will change, traps will randomize, loot can be different. There's definitely reasons to return and explore more!
SimGuruMegs says there are new aspirations and that there are limited layouts (for the temple) but the traps and loot are randomized.
Other InformationNew Lot Traits
No new career, but the Archaeology skill can be leveraged to generate tidy profits. (simguruninja)
The Cantina is a Bar venue that has special behavior in Selvadorada. But it's a venue, so you can freely modify or change it as you like. (simguruninja)
The Temple is an uneditable venue type.
You can place all the traps at home and build some pretty amazing things with all the new BB offerings, albeit with different functionality than at the Temple itself. (simguruninja)
We've given you some new ways to prepare for and protect against the many dangers you'll inevitably face. (Protip - Folks who have the Herbalism skill from Outdoor Retreat also have useful recipes available to them) (simguruninja) This was in response to a question about the poisonous spiders/bees and traps etc mentioned in the official blog.
At least two new radio stations