Now that the title has grabbed your attention, lets begin.
I don't know why, but were TWEWY to have a lovely sequel, would you think it would be a great idea to have it on the Wii U?
Think about it. One player could be Neku (or whoever is the protagonist) and use the touch screen pad to control his actions with the touch screen, while the other can control the partner with the Wii remote with the directional buttons.
If there's only one player there, he can use the touch screen and the directional buttons on the touch screen pad.
I might be completely wrong, but that would be a great idea.