I think they should make a game with the option for both genders. Zelda is a game that appeals to both males and females, and there is little reason for Link to be one gender or another. One problem may be if the story relies on a romantic connection between Link and another character, but that could be solved by altering the other character as well or just making Link gay/lesbian if you pick a particular gender. The overall story of the series doesn't necessitate a male Link at all because usually it's a different Link in each game, and there is no reason why a chosen hero would need to be male just because all the previous ones were male. Link being male up to this point is a relatively inconsequential detail. It's not like James Bond - he has a major characteristic of being a womanizer.