Update: This system has been verified to be a fake.
With a retail listing outing it, the Zelda-themed 3DS XL is all but confirmed. However, there's potentially one more limited edition Nintendo handheld coming this year--one that celebrates the Year of Luigi.
A tipster sent Kotaku shots of the box and system of a green-and-white 2DS system. The box includes an ESRB logo, indicating a potential US release.
It looks pretty legitimate, but like the Zelda system, Nintendo has yet to officially announce the hardware. Shacknews has contacted Nintendo and will update as more information becomes available.