Here's a crazy idea:
Technically, this is the 25th anniversary of the 1st Zelda game, back on NES, right?
What if they repackaged that? And that's it?
[Okay, take out your torches and pitchforks now!]
I would love it if they did something more substantial, like remaking the 1st Zelda with higher quality sprites or [gasp!] overhead polygons like Phantom Hourglass or Spirit Tracks. But I think they've got everyone who can in any capacity contribute to making games working on 3DS or CAFE stuff, so I'd imagine they can't spare the manpower for something that won't be a system seller. They even had to farm out the Ocarina 3D-make.