Gotten back into two fandoms I have had very little luck of:
1. Pokémon
At one point this was so over-saturated in my requests that I stopped actively searching for it for three years, until now that I've finally gotten my lazy-ass playing the games and watching the new anime. So far the pool of interested people have been pretty slim.
Basically a story-driven adventure with romance would be something I'd love to do with this.
2. Fate/Type-Moon
My favorite bigger franchise/fandom, which I have gotten a lot of interest for over the years, but never gotten anything that great out of.
Would absolutely love to do story-driven roleplay set in Fate-universe. Own grail-war, maybe a grail-war gone wrong like Strange Fake (anime hype!) or Apocrypha, or just explore possible ships in properties other than F/GO, which I enjoy and play regularly, but man it's so over-saturated among people who are looking anything Fate-related to the point I only have very few ships I am interested even lowkey searching for unforseeable future.
Also some lesser-known Type-Moon properties, such as Tsukihime, Kara No Kyoukai, Mahoyo and others would be fun too, and rarely see people even mentioning these.