Epic Disney Racers is a scrapped racing game that was to feature characters from both the main Disney animated canon and characters from the Epic Mickey Series. Concept art exists of the project, but it seems that it was ended early in development.
Characters seen in concept art, that were presumably intended to be playable, include:
Oswald The Lucky Rabbit
The Mad Doctor
Scrooge Mcduck & Huey, Dewey and Louie
Cruella De Vil
The only possible stage shown through concept art was Agrabah, as seen above, in which the Palace and the Streets can be seen.