Slick, the gamecube version of TP released a month after the Wii version... exactly like they are doing again here. You might want to check your "chronology of events" details.
They were not designed for the new systems, they are ports and they were intentionally delayed on the older system to help sell the new one. Skyward Sword was the Zelda game actually developed on and for the Wii.
I don't know what the hell they are thinking here... no part of this new system appeals to me (as a rabid nintendo fanboy) and that's going to be a huge problem for them.
A ported Zelda again, a ported Mario Kart... and no signs of life for Kirby, Donkey Kong, Metroid, Star Fox, F-Zero, Mario Party, Smash brothers... it's like they aren't even trying.