I think the doubters are WAY underestimating the potential of this game. I think it could have stratosphere-sized sales, at least in the same range as Mario and Sonic 5+million range in sales. You guys are forgeting that this is Disney!
When Disney wants to sell a product, the have the marketing muscle to get people hyped. Epic Mickey may end up being the most-heavily marketed Wii game ever. Disney has a lot of outlets from theme parks, animated movies, TV network, website, sports channels to get this product out there. It appears that they really want to remake Mickey. If so, then they will stop at nothing to let people know about this product.
Marketing Epic Mickey will not just be marketing a video game, it will be a complete re-marketing of the Disney brand. Disney will actually be doing 2 marketing campaigns with this one.
The demographic of Wii and Disney is very similar. All Disney needs to do is figure out how to get all those people that bought the Hannah Montana game to come out in droves.
Finally, Specter is a fabulous game maker. He is much more than Deus Ex. He was the creator of Ultima which inspired Warcraft. This will be a FUN game that will have Mario-like appeal. If the came comes to proper fruition, the crowd that bought New Super Mario Bros. Wii might show up for this one.
This isn't going to be another crappy 3rd party game that doesn't get marketed. Disney is going to give this Modern Warfare like treatment. This game has serious potential to catch fire, and if it does it could easily outsell any of the top HD games coming this year.
I make a bold prediction, but I think Disney took appropiate risks and has the power to market this game. Now all we need to do is wait and see if this game is any good.
Most anticipated games of 2011:
Uncharted 3,Legend of Zelda: Skyward Sword, Rocksmith
Modern Warfare 3, Super Mario 3D