Take a look at Ovarr Town, one of the postgame areas of Pokémon Gaia in the upcoming v4:
As you can tell, the connection to Ovarr Town via Archan Tunnel will be unfinished when you start your journey, as the ongoing tremors make construction too dangerous.
It looks like Terra / Gaia (depending on which player character you chose) is interested in Ovarr Town's Inverse Gym.
Another destination of interest in Ovarr Town is Mrs. Nature's place:
After a dramatic entrance, Mrs. Nature will, for a reasonable fee, ask you a few questions, before predicting the Nature of encounters you've yet to have!
The results are in...
Looks like her prediction came true!
Mrs. Nature's abilities are similar to Madam Celadon's, from Let's Go!.
However, as Pokémon Gaia does not have a day/night cycle, fortune will last for a certain number of steps before wearing off instead of lasting a day.
While the fortune is active, all wild Pokémon you encounter will be of the Nature she predicted, but you can always pay for another telling to change this, or walk around enough for the fortune to wear off.
Her fortune will also take precedent over Synchronize's field effect on wild Pokémon's Nature (which I felt the need to explicitly say because Let's Go! had no Abilities so it was a priority I had to decide on). Also worth noting Synchronize's field effect is also new to v4, thanks to a routine by Squeetz/BreadCrumbs.
Thanks to cuddlesthefatcat and LunaMaddalena for the tiles!