Disney and Pixar characters will meet up for the first time ever in a new game being developed by Disney Interactive. Not much is known about that game except that it's currently being called "Toy Box"
According to the New York Times, this will be a console game with with a lot of mobile and online features.
It's not known what consoles this game will be hitting, as Disney hasn't officially announced this game. But I'm willing to bet "Toy Box" will land on a Nintendo console.