http://marinkoillustration.com makes an amazing posters for some of The Legend of Zelda games. these games are The Legend of Zelda: Ocarina of Time, The Legend of Zelda: Majora's Mask, and The Legend of Zelda: The Wind Waker.
This is an official Majora Mask's poster that looks like a good movie poster.
I couldn't find Skyward Sword or Wind Waker posters.
This one is from Brocko18 of Deviant Art
I liked the Ocarina of Time poster, but having Zelda on it would make it better instead of the skull kid.