Not sure if this is really a succession fort pitch per se. See, something that always bothers me when I play is I like to name all my people. While I have some friends on an IRC, sometimes they're too wrapped up in... non-DF stuff to offer to be named. And sometimes I run out of video game character names - or when I keep getting 20-30 migrants each season.
So as I was working on Voile Fortress, I thought, "Hey, maybe a community fort type thingymabob?", it could at least provide me a pool of names to use and all that. While I'm not against a succession fortress, I'm unsure how many people are up to writing one about something NOT dorfs, as the mod uses Koakuma instead.
I'm at work now, so I can't really say what kind of embark it'll be at the moment. But probably something not too friendly, maybe not evil but maybe. Possibly a volcano, if I can find a nice one that doesn't completely make the place a mess. My playstyle tends to aboveground fortresses/castles/towns, whatever you wanna call it, but if we do succession you're welcome to start carving out more underground of course.
The mod will be my own, Voile Fortress, which aside from adding in the Koakuma civ and some stuff for them, is largely vanilla content.
Oh right, as an aside, I can't promise in a succession fort that I'll hand it off in a "good" state. I have a bad habit of getting so wrapped up in making the fortress, I forget to make those little, unimportant things... like bedrooms and dining halls...