Interview wrote:umazaki: “We’re really interested in making a fully 3D Kirby game! I suspect there are also more than a few users who’d appreciate being able to freely run around a sprawling map, fighting with copy abilities."
Full Interview
I would like to see a 3D Kirby game on the Wii U at some point. I still don't know if the team could make a full 3D game though since Kirby's movement has mostly been in 2D.