I know the Amiibos are Nintendo's planned "next big thing", but why not bring back old games...literally? That could be bigger than anything.
Seriously. No one loves nostalgia and classic gaming more than Nintendo, so what if Nintendo restocked gameboys, super nintendos, n64s and games on the shelves of Walmart, Gamestop, Target and other retailers?
A lot of people are looking at old record stores, garage sales, eBay and Amazon and buying old games. I know so, because I am a regular customer and I know how high the prices for these old games can be. Not to mention, I frequently participate in bidding wars for classic games. Collector's simply prefer a hard copy over a digital, there's no doubt about it. I seriously think Nintendo could release old games ($40-$60, depending on the game) and turn a profit. It's far less costly to reproduce a game that's already created than building new ones from scratch (not that I am not excited for new ones, this could be an entirely different division working on this project).
Not too mention...this could set them apart greatly from other companies. They would be the only ones re-selling their classic games (at least for now) on the main market.