Keep the green tunic. It would be weird to see Link adventuring in anything else at this point. I mean, why change what we grow up with? that would be like if they suddenly made Sonic green or something.
for me it`s very important for Link to keep his tunic.. Green! the only thing I would like to see a little changed is the looks of the tunic. the only visible change I saw with the SS tunic from TP was that he did not have the arm coverage. so I say, keep the tunic green, but with a little changed look!
What? Introduced? I guess we're disregarding the way he changed his colors when you got magic rings in LoZ or used magic in AoL or the colored mail from LttP.
As for his actual clothes and not simply colors, Nintendo should go the Assassin's Creed II route, giving Link an outfit that's both recognizable and coincides with the setting's fashion ideas. Also letting us purchase dye jobs but starting in its original color scheme.
Keep the tunic green, without the tunic it doesn't feel like Zelda. Why, you ask? Well, it just so happens that I feel that since the tunic has been used since the first Legend Of Zelda in 1986, I feel it should carry on to the rest of the series.
The tunic is fine. I voted unsure. Like, in Oot, they had him running around in just a tunic as a child...is that even historically accurate? I always see medeival men wearing pants or tights beneath the tunic. Anyway, that doesn't matter much now. I don't think they can change the green, that's Link's thing, you know? Maybe they can add a bit to his outfit to make him look more hardcore, like more (but not too heavy) armor. I liked the additional armor that was added in TP. In ALttP, you get a cape at some point. Imagine Link all made up in armor and the cape thad be pretty sweet.
NO DON'T CHANGE THE CLOTHES OF A HERO!!!!!
The famous Hero's Clothes is an icon for the Zelda series. It is was keeps the medieval theme throughout the series. If Link were to wear pants, that would be the day I - wait. I mean like denim jeans 'cause in Skyward Sword, Link has baggy under pants (not tighty whities) so when Link wears modern clothing, that would be the day I will hate Zelda. Well not really cause its the coolest game out there no matter what.
I'd personally wouldn't want a new set of clothes, I'd personally prefer palette swaps and jazz. Maybe a black tunic after these years. The Goron tunic was a classic, and I hope they bring it back (>.<). Maybe even a white one, heck. There might even be ones you could use as camouflage for areas (Green for Forests etc.).
Even if they don' have 'powers' I'll still parade around in my favorite. =)