I don't want it to become a 'thing,' but seeing as how this is the first game in the supposed timeline (or before Ocarina of Time, anyway...), I would actually love to see a romance between Link and Zelda. Being a romantic at heart, I've... kind of been waiting for this since I first saw Link meet Zelda in Hyrule Castle Courtyard in Ocarina of Time so many years ago... I think it would add a whole 'nother element to the story - who doesn't love a good hero story where the brave swordsman must rescue his one true love?
Plus, in a few interviews (not with Nintendo officials - I think it was a G4 broadcaster maybe), they said the romance was driven pretty strongly at what they found out at E3, so yay.
But, like I said, I wouldn't want it to become a staple of the series - I just think it would be interesting to see happen if they got together. Because, theoretically, if they did get married or whatever, and had children, that would be the start of the Bloodline that almost every other Zelda game alludes to. Sweet.