So, here's some examples from my world.
My current world is Slozgo Sagus, the Universe of Dawning.
I ran this world from about 250 years in worldgen, and after that I managed to play till at the least year 279. Here's a few of the key points of interest.
NestledbeakNestledbeak was the capital of the Disemboweled Realm, a human civ. They got into constant fights with elves from the trustworthy jungle of burials (two of the several elven civs in those jungles), who in turn kept razing Nestledbeak to the ground each war. Eventually that stopped, but the Disemboweled Realm is not in control of Nestledbeak anymore, and I can't find them either. My only adventurer I was able to make of that civ spawned on top of a tomb, walked inside the tomb and freed an angry mummy. I wasn't able to make any adventurers of this civ afterwards, and when I came back with a different adventurer, that one too succumbed to the angry mummy who was now prowling the hills around Nestledbeak.
But, what is really interesting about this place is that the town itself is a hive of spies and people hunting artifacts. Whenever I visited with an adventurer it was filled with questers and the legends mode is filled with false friendships being formed there.
So I am really curious what the villain release is going to do to this place.
The Insightful Empires.So, this is another human civ. and the first thing you'll notice about them is that they're really really really into Romance. Like, half of the randomized adventurer rolls end up with a 'dreams of falling in love' dream. Other than that they haven't done anything interesting, besides getting attacked by a Hydra. So I am curious to see if next release (they don't value friendship and family, only romance) will have a lot of love triangles and jealousy manifest here.
There's also a hamlet here that intersects with the world's only volcano ('intersect' being the main keyword here...), to much hilarity. I wonder if it'll reproduce next release.
The Legendary SwampThe final area I will tell you about is a region. The legendary swamp is interesting not because of how large it is(but I do think it is the largest region in this world), but because it houses two different Necromancers. On the left, near the mountain ranges is Oilycolors, which holds an old Dwarven Monarch and is a proper Necromancer tower. The mountain ranges are inhabited by said Dwarven Monarch's people, the Boot of Portent (purple-blue). They're under constant duress from the elves down south(yellow), and the goblins in the middle(bright green).
On the right is Knitshoots, which is not a tower, but still a Necromancer camp. This thing is also the reason I had to stop playing this world, because I visited it with an adventurer, and got murdered. But afterwards, that whole region now has dozens of zombie travelers flitting about and ever since my games in this world are really slow.
The towns around Knitshoots are from the Poetic Confederacy, who live at that coast. They're really into knowledge, with Creaturedrove having a HUGE library and two temples. They're not the people the necromancer came from however, he was a previous lawgiver of another human civ which is on the island to the west.
So what I am wondering about this place is how much it is going to be filled with zombies and whatnot.