Really, I think EAD Tokyo Mario game, Retro game (Metroid Prime 4?), Monolith game, Zelda trailer, a couple other first party games and some significant third party exclusives would stand up pretty well against new consoles. I'm not actually expecting Nintendo to pull that off, but it'd do the job.
Either way, I expect the 3DS to be pretty much ignored in the press conference this year, but hopefully with more of a presence on the show floor this time. That war's already over, Nintendo needs to focus their attention on the one they can actually lose.