The following info comes from an EDGE interview with Nintendo producer Yoshiaki Koizumi and EAD Tokyo team leader Kenta Motokura...

- work has begun on a new Mario game
- won't reveal if its for 3DS or Wii U

“I can tell you, though, that we’ve already started approaching our next challenge. There’s still a lot more room for discovery and invention, and we’ll continue to propose new and exciting game mechanics going into the future.” - Koizumi

- if the next title is a Wii U game, Motokura says the team “might need to make even more use of the GamePad.”
- the Double Cherry power-up was once again confirmed to spawn from a glitch
- Cat Mario came from a desire to have Mario make use of the ground and other surfaces
- this idea started out with the characters running around on all-fours
- when originally tested, the characters that ran on all-fours were simply a different color