Link and Linkette!
I get what you're saying, but Link is more of a "Stand-Alone" guy, I mena, he doesn't really need a human companion with him. I think, in all honestly, it would hinder, not help, at all through-out the adventure. a 3D Zelda with multiplayer isn't really needed at the time being. Maybe in the near future, but I think it would just, not ruin the series, but make the series lose value.