Epic Mickey 2 is apparently the real deal and set for a 2012 release. The information comes from a NeoGaf user who confirmed that Disney had prematurely released a newsletter confirming development of a sequel to the 2010 action adventure hit starring Disney's favourite mouse.
According to the newsletter, Epic Mickey 2 will arrive on PS3 and Xbox 360 in addition to the Wii and will presumably be compatible with each system's respective motion control peripherals. The game reportedly features a co-op mode and is said to in the works for the Wii U as well.
Epic Mickey 2 is scheduled for a Fall 2012 release, if the report is to be believed.
Source: My Nintendo News