2 Super Genius Ranma:  Alternate history storyline, begins when Nadoka learns
she's pregnant just before Genma can leave on THE training trip.  Because of
this Ranma has a much more normal childhood, Applies himself in school, and
developes his mind.  He skips classes three times, sneaks into university
libraries, generally becomes a very young genius.  Then at 14 he becomes
interested in studying Chi.  He takes two years off from school and goes on a
prolonged training trip to china.  After an incident at Jusenkyo, Genma
reveals
the Tendo engagement, and they return to Japan.

Dang, I'd really like to see that one...