Nintendo's had plenty of support for the Wii U eShop (NES Remix 1 and 2, Dr. Luigi, Pushmo World, releasing Wii Sports Club and Wind Waker HD first via the eShop). There's a Mario Vs. Donkey Kong game coming out that I assume will also be an eShop only game.
It doesn't make sense for third party indie developers to stick with just one console(unless one of the is footing the bill). The best Nintendo can do is appeal to developers enough to make Wii U their lead development platform. On that end, Nintendo has had some very good timed (Nano Assault Neo, Shovel Knight), console (Toki Tori 2, Edge, Rush, Armillo, Tengami) and Nintendo exclusives.(Mighty Switch Force HD, Shantae). They need to keep going with the relationship they have with the Image & Form, Two Tribes, Knapnok and Team Cherrys of the world.