Originally they were going to make the pilot a bit older and the female Captain a bit younger and the intention was for a relationship to form between them but according to Robbie McNeil that obviously never went past the 'idea' phase.
That does make me wonder about something. They originally wanted the character of Nick Larcarno. Would he still have been the pilot? If so who how much younger was the Captain supposed to be? Or was Larcarno supposed to have another position....like OPS or tactical?
It's a pity because it would have been able to work. It seems to me that the alchemy between them was very present, much more than between Janeway/Chakotay (idea quickly ruled out by the producers in Resolutions in S2 at request of Mulgrew, if I remember well - , but that got established in mind of many fans) or Chakotay/Seven (stupid idea -> after having seen Endgame, I had the impression that Chakotay - for lack of having Janeway - had had Seven as consolation prize).
(and why an older woman wouldn't have been able to fall in love with a younger man while the opposite is more acceptable?!

Euh, who is Nick Larcarno?