The potion bottles on the back of the shield are EFFING BRILLIANT! I'm planning on doing a Protoman costume from Megaman and that gives me so many ideas!
Looking good so far. The first thing I noticed that was missing was the hauberk but I see you have that covered. Other than that, maybe add in the scroll detailing at the corners of his tunic? Nice choice on the tunic/hat fabric, by the way
I don't know if you'd be interested in changing your ears but Aradani Studios has some nice ears that point upwards more like Link's. One of the guys who runs the site is also a Link costumer :thumbsup