I don't think that Dark Link is used enough. Several Dark Links appeared in
TP, but you never fight any of them. Several famous fan articles like that recent eternal child one, suggested that
MM had a coming of age theme. Wouldn't a fight against dark link have been appropriate for that? Sure, Link did that in
OoT, but why not make that Dark Link more authentic. Make him spawn from Link's shadow or something, and do more than just mimic Link's moves. In
FSA, there are several dark Links, but that just makes them less special to me. I hope they bring dark Link back in Zelda Wii, and Spirit Tracks, and that they use him right.