What I find interesting is that the theme parks seem to be taking center stage- all other Disney games focus around the character, but the group of Disney World parks perched atop a giant Monstro is an amazing sight and helps to make the parks look like characters themselves.
In one image, you see a bear from the Country Bear Jamboree attraction has morphed into some sort of mechanical scorpion. This makes me think that the concept art of Goofy, Mickey, the Pink Elephant, etc aren't the actual characters themselves but rather the audio-animatronics that made Disney so popular in the first place. This would leave room for the -real- Disney characters to take center stage as protagonists, which would make sense since the game, even in it's project-in-development name, is named after Mickey.