As far as I remember, we may expect two updates - fall and winter.
I presume, it will be related to the Halloween somehow and what I realistically may expect is:
- Seasonal event (including mini-game hosted in Halloween day)
- One new character
- Some crafting recipes
- Special drops from trees or balloons
- (Maybe) extra fishes / bugs
And... that's it. Obviously I can be wrong, but trying to analyse and compare ACNH to older games, including ACNL there's no place for old ideas.
Examples:
- System of dialogues / friendship (known from ACNL). This time we have something different, finished and there's no place for coming back to previous one.
- Tortimer island - as we may noticed, all mini-games now we have on our island, not anywhere else.
- Club LOL - will not be back, as K.K. is performing in new, different way (don't want to spoil)
- Brewster and any coffee shop - will be not existing any more, as there's no place for this in Museum.
I really hope, I'm wrong and we will get something connected to older versions and given with new, better ideas.
As ACNH has a big success Nintendo will do something, to get more customers, and will make this game more interesting. However, I'm not so sure if any elements from previous version meant to be implemented in the current version.
Personally, I would like to have everything what makes previous games so unique, but for now, I will try to be patient and just wait at least until the end of the year for a final verdict.
I really hope, and I want to wish all of you, spend so many hours with ACNH and hope future brings best updates we ever seen.