Wow, I wasn't expecting this many responses! Thanks, everyone.
I actually have no ideas for a storyline. The first one pretty much wrote itself once I got into it. I thought it might be interesting to start with Carina again and see what kind of family she can produce the second time. I also like the ideas of Midnight and the spares. Indigo would be good because of her startling resemblance to Carina, and Chartreuse would be good because she's a bit unusual looking.
Does anyone know if the new families that come to Twinbrook are as ugly as the original Townies?