Honestly I wonder how many islands Nod-Krai will get by the end of its series.
Inazuma started off with 3, NK seems to be the same, or at least main point of interest with Fatui base+deer fucker shrine+graveyard+favela.
If they are wrapping up loose ends, then surely we will get new area expansions for some places.
They said that they'll come back to Mare Jivari, so I feel like Enjou's quest will resolve with that unless they're making it episodic.
We never saw Dorman Port, so I feel like we should get that if they're not expanding Nod-Krai since we're getting Mondstadt characters.
Mont Esus West. I dunno what Fontaine quests that would relate to.
Blackcliff Forge? Lantern Rite maybe.
Apep mellowing out?