I doubt a Sailor V movie would generate much interest, only the hardcore SM fans would know about the Sailor V manga series, there are still many casual SM fans out there who are unaware of the fact that Sailor V was a prototype manga series a precursor to the SM series, many don't even know a Sailor V manga series even exists! And there are many SM fans who don't even like Sailor V or Sailor Venus either. So making a movie that's mainly focused on Sailor V would most likely fail and generate much less interest IMO, heck, I even have doubts about whether an American live action movie for SM would be successful or not, let alone a Sailor V movie.
True. And that only makes worse the fact the final chapters are perfect for a movie.