Let me get this straight, is it going to be a NEW family/character/plot idea or is it, as Sarah suggested, something more like a spin off from the original (and which original is totally up to you I figure) placed a few years perhaps in the future?
I have to ask, if there's an idea to do a new story completely separate from the first, where do you start this new universe, and if you were to spin-off how would you incorporate new people, not necessarily as family members, and how do you treat the pre-existing family members?
I'm not totally sure you could pen a new story using one person's perspective (I, me, mine POV as opposed to we, they, he, she, etc) with using so many characters. May be a bit overwhelming for you when you don't have much time as you suggested. If you used everyone's perspective it might get confusing, if you wrote a new perspective for every character you could find yourself limited in how the plot develops, if you use a distant third perspective like a narrator you don't get as involved with the story as you could... either way there's pros and cons to the way you pen it.
Jos had an interesting idea in another thread to record a story on mics. Expanding on that theme for those of us who don't want to record our voices for the world or who may want to stick with semi-familiar territory (if it's a spin off to the LPF/Bourdon/Bennington family). Why not provide the starting point for a plot and have everyone adopt a character/persona (like roll-play?) then have them write a view point for their characters. The danger is the stories might not line up perfectly but if you let people write their own parts you might take the story in places where you hadn't even considered. You could moderate, that means you can still write your part but not be stuck doing it all. Just a thought *shrugs*
I'm just thinking that with people now feeling inspired to write again why not look for some common ground?
I could say we (maybe I) have flogged 'the family' story to death... but maybe not. It's familiar territory so half the work's already done for you in some regards as far as the base work. Adding new people might inject new life into it. Might tweak it in a whole new direction. Might not. But didn't you leave your last story unfinished? How do you do a sequel for something incomplete? Besides, if you start something new you don't have to re-educate the masses that don't know about the stories in any great detail.
Either way... ****, I recant.
If you want help count me in. See what I can do