I'd be down. It would be cool if there was some sort of Dark Link 1v1 or arena mode kind of like in ALBW, but with live online players. That way players can play as the character they're used to against others on an even playing field without betraying the canon. 1v1 on cool little boss arenas, or something like a 5 player death match in a larger map arena. Obviously everyone will just look like Dark Link to you.
A co-op mode with a friend playing as Zelda or again as Dark Link would be cool too, if it doesn't effect the frame rate negatively. They could help you with post game boss rushes or with unique co-op only side dungeons. There is so much that can be done to extend playtime.
I see no reason why online multiplayer can't fit in a Zelda game, and the only reason I don't want local is because it may lower the framerate.
EDIT: They can also have four player online co-op with 4 different colored Links like what was done in Luigi's Mansion 2.
