There is a Hidden Mickey on Toy Story Midway Mania at the loading dock for the ride.  If you look at the wall on the backside of the loading dock you will see a three toy story characters in circles.  The circle with Jessie makes the head while the circles with Bullseye and Rex make the ears.

Below is a picture of the Toy Story Mania Hidden Mickey formed from Jessie, Bullseye, and Rex.

Toy Story Midway Mania Hidden Mickey Mural