I hope I'm not offending anyone by writing about Nomad's digital version of Talisman. I just saw on social media that a unique expansion, The Realm of Souls, is in beta testing.
This is quite far out of course. Makes me wonder if there will be more and what form they may take.
Before the Digital version I often tried to imagine what kind of expansions I would make or be interested in. I liked ideas that favored continuity between expansions and also connectivity. I always thought there should be more ways to have trap doors, secret passages and 'expanded' views of The Castle, The Hidden Valley, or other spaces on the board.