Pixar unveiled a big new project Friday night at D23 with its promotion for "Hoppers," a body-swap story starring Jon Hamm, Bobby Moynihan and Piper Curda ... big summer for Disney's beloved ...

However, since Disney/Pixar often dominate the box office ... a girl who swaps bodies with a mechanical beaver, Piper Curda (I Didn't Do It) will return to the Disney fold after A.N.T. Farm ...