There was a Chinese interview about the game and some details:
-Game has been in development for 2.5 years and theme is exploration. The game will be throwing you into a forest instead of a ranch to bring the player closer to nature
-60 crops to grow. FoMT remake had 20 for comparison
-There are both simple and complex mines
-You can make clothes at the tailor
-Restaurants are part of the game's social aspect. There are characters that like to cook and you can give them your cooking
-The animals in the game all have the same artstyle as FoMT. They want the character style to change as it fits a given title, but have one consistent style for the animals in games
-In addition to heart events there will also be events about listening to worries and emphasizing individuality with the marriage candidates
-No secret candidates this time around, but they are discussing whether or not other candidates can get married with each other(aka rivals)
-It is possible to date multiple people like in FoMT
-Your spouse will not help you on your farm because they have their own lifestyle and careers
-There will be more to do with children growing up over time compared to FoMT. Children can't become adults, but there is more growth than FoMT
-Kids can't be customized, but characteristics of both parents will be reflected to an extent
-Can't talk about whether or not old characters will cameo, but it has been discussed
-Same amount of town characters as FoMT, but slightly less marriage candidates(FoMT had the two new candidates and the special candidates)
-The worldview has been redesigned and it took longer to develop characters. Compared to previous titles the character personalities are more complex, so there are less characters to love, but more depth
-No Harvest Sprites
-Multiseasonal crops are back
-No new animals, but many old ones including goats and buffalos are returning. Different chicken variantions and many different types of animals you can ride
-Animals can be tamed in the forest and brought back to your farm to be raised
Gematsu article show the previous stuff from the website update:
Story of Seasons: Pioneers of Olive Town details crafting, seasons, discovery, town development, and more residents - Gematsu