I just don't see that as a sound move, from a marketing perspective.
With the Wii, Nintendo moved their target audience to young teenagers/children/families, which allowed them to stay away from direct competition with Sony and Microsoft. Obviously both companies have tried, since then, to expand their audience in order to remove Nintendo from this stronghold that it so sneakily took, right under their eyes, but as of yet they've been met with limited success.
Whilst the move towards this new audience has, however, left Nintendo with a lot of experience developing game geared towards casual gamer, they're now sorely lacking in experience dealing with hardcore gamers. Especially seeing that Sony and Microsoft have obviously taken advantage of Nintendo effectively dropping out of their competitive zone, and have since slowly shaped their audience's tastes towards action-filled, graphically stunning, easy-to-control games that they seem to excel at producing.
Look at how many sales trash like Arkham Asylum, Devil May Cry, Final Fantasy XIII, Bayonetta, Gears of War and COD4 get. They all follow a very simple design philosophy, and one that is in tune with the target audience they've managed to engineer.
Even if Nintendo were to release amazing games in the vein of Super Mario 64, Melee, Star Fox, Megaman, Windwaker, Ogre Battle, those amazing Snes RPGs, and Perfect Dark, I just don't think they'd sell, and I'm fairly sure Nintendo understand this as well.