Earlier today Disney held a presentation at the D23 expo where they revealed some new information and characters for the release of Disney Infinity next Sunday.
With this they have officially announced nearly all of the remaining rumoured playable characters including Wreck-it Ralph, Vanellope, Phineas, Agent P, Buzz, Woody, Jessie, Rapunzel, Anna, Elsa, Jack Skellington, and of course Sorcerer Mickey himself. They also gave out pre-release toys of Mickey to the attendees, he won't be available to buy until much later.
Along with the characters they have announced the Toy Story Play Set that we've previously seen glimpses of as well as details for the mobile app that will be accompanying the game at launch.