I may add to I5. Not sure though. I have been losing some interest as it seems half of all changes are vagina based and the trend seems to be every man leaves his girl once she gets a dick.
I have an idea in my mind about exploring the lives of 3 or 4 people in New England and how it changes as I5 makes its way across the north east.
So far my ideas for changed people include a college professor whose wife becomes more manly who is studying the reactions of changed people and struggling to love his wife, a gay man struggling with now being able to get pregnant, and an agent (likely either FBI or NSA) trying to track down the I5. But this is an involved story dealing with several people so I may lose interest before I start. Especially as my I5 interest in general is starting to wane slightly.