Ranma freaks when she sees the Kenshin group, Seems there is a picture of
them in his mother's family photo album, the one they took on that Train
trip. 

Kenshin and Kaori are Ranma's great-great grandparents, on his mothers
side, that's where the red hair came from. Ranma goes into one of his
ilogical honor panicks, after he blurts this out to them while in girl
form. He is determined they won't find out about the curse, and refuses to
change back to a guy for fear that the pair of them will think him a
disgrace to the family. 

And of course, the ancestral Saotome sword turns out to be a Sakaba. And
it also turns out that Sanosuke is one of Ryoga's great ancestors. Maybe
the Tendo ancestor turns out to be Tae (the waitress).

So, is anyone planning anything like this yet?

-Mark