Not really costumes that I'm planning on making, but it's just a few dress designs that I came up with for Zeldanime's new contest (http://www.zeldanime.com/?p=2731)
The first concept is kind of based off of a Hylia Goddess / Fierce Deity Link / Fi look. I like the opalescent, changing fabrics with the Fi/Fierce Deity designs, yet I love the simplistic goddess dress from Skyward Sword.
The second concept is a little tribal with a touch of sari influence. I absolutely love saris by design, so I figured, what the heck!
The third design is obviously heavily based from the Twilight Princess design, with a more renaissancey/steampunky flavor.
See the black and white sketch here: http://linksliltri4ce.deviantart.com/art/Zeldanime-Contest-Entry-Draft-282437671