Bethesda: Wii U is "not on our radar". "It's largely a hardware thing."

[VGPolyglot]

The only games that Bethesda ever published for a Nintendo console are:
Puzznic (NES)
Star Trek: Tactical Assault (DS)
Star Trek: Conquest (Wii)
Ducati Moto (DS)

Bully (Wii) and Wheelspin (Wii) were published by Bestheda in Japan and Europe, respectively.