Don't quote me on this, but I believe the following piece of art will be featured, in some form or fashion, on the cover of The Legend of Zelda: Ocarina of Time 3D when it's released this spring.
I also like the looks of the box art that's being prepped for two of Nintendo's other early-ish 3DS releases: Kid Icarus Uprising and Pilotwings Resort. (See both box arts, and many others, here.)
If you're at all interested in the 3DS--and who isn't?--may I suggest checking out andriasang.com and tinycartridge.com? (Oh, and check out this Kid Icarus Uprising video, too.)