I've just released in beta, a web-based application called Verse Draft: https://versedraft.com
I wanted to create an all-in-one writing studio where fiction writers can keep all the details for an entire universe in one place while crafting stories, novels, movie scripts, TV series, or stage plays.
I also wanted the ability to allow for the limited use of AI in a way that only functions as a sounding board and does not write for the user; Where fiction writers could have access to tools such as a virtual assistant that they can converse with about their stories and world-building, but without it writing anything for them.
There is also an option to use the application without any AI tools at all.
Very cool. On another note I think this would be amazing to have for fans, and markedly better than what we have now (wikis). Maybe you could have some of the features available for fan communities.