My guess is that, considering this time they have some third party support, the console still has an overall appealing library and there's no rush to release a game from every IP they have
On top of that, I wouldn't be sure of the existence of a lot of mid-tier Wii/DS similar projects. Iirc, Another Code R for example won't happen, neither Sin & Punishment, 2 Metroid games and a good Trilogy, another Disaster game, Wii play or Wii party.
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Prediction: No Zelda HD for Wii U, quietly moved to the succesor
Predictions for Nintendo NX and Mobile