To summarize: no, yes, and maybe.
The Pinball Arcade has been given release details for Wii, Wii U, and 3DS on the game's official Facebook page.
In regards to a Wii version, developer FarSight Studios stated that "Unfortunately, the Wii isn't powerful enough to run Pinball Arcade," but concerning a Wii U version, FarSight is "very excited about the Wii-U and hope to release as close to the launch of the platform as possible."
The studio also spoke to the uncertainty of the title's future on 3DS.
"We have a plan to get the performance we need out of the 3DS to run the ROM emulation, however some R&D is needed before we know for sure whether it will work. The 3DS version is on hold until we can invest the time and resources into this R&D."