Speaking to Associated Press, Mario creator Shigeru Miyamoto confirmed that Nintendo is actively preparing for its upcoming console even though their main focus still is on Wii U software.
"We're focused on providing a robust line-up of Wii U software for next year. It seems like we've managed to do that this year and people are very happy with what we've done on Wii U," he asserted.
"For the time being, our focus is on the Wii U hardware, but Nintendo as a whole has groups working on ideas for new hardware systems. While we're busy working on software for the Wii U, we have production lines that are working on ideas for what the next system might be."
Additionally Miyamoto revealed that Nintendo might make some Amiibos available in card form as an alternative to the discontinued figures. He also suggested that it will be a while before we get to see a new Mario outing. "I think that maybe when we release the next hardware system, you can look forward to seeing Mario take on a new role or in a new game," he pondered.