I was going about my day checking my usual forums when I came across this.
From Penny Arcade forums:
For last three years Warren Spector's (Ultima Underworld, Deus Ex, Thief) Junction Point has been working on secret Disney project. Today chunk of the game's concept art was leaked to the net by Superannuation blog. The project has code-name "Epic Mickey", and by doing some cross-referring, NeoGaf was able to find artist Tony Pullham's CV. Pullham is responsible for the concept art, and his CV confirms that the project is for Wii.