In a recent interview with the chap behind Disney's Epic Mickey, Warren Spector, he confirms the project is still Wii-exclusive.
Speaking to Atomic Gamer earlier this week, Spector was questioned whether PlayStation 3 and Xbox 360 owners could see a version of Mickey's latest adventure given the emergence of PlayStation Move and Kinect. Whilst these technologies are available, and would make a port far easier, Epic Mickey is in Nintendo's court for the time being.
Sure, it could happen. But I've been a Nintendo fan...well, not as long as I've been a Disney fan (laughs), but a long time, and I've been pretty open about the fact that the Zelda games are some of my favorite of all time. So we're a Wii exclusive and I'm happy about that.