Hi Karen,
I sure wish that there was but unfortunately at this moment in time, there are no Character meals available which feature characters from the Disney-Pixar films aside from
Les Chefs de France in the France Pavilion at Epcot where Chef Remy from the Disney-Pixar film Ratatouille travels from table-to-table on a rolling gourmet food cart.
When the food cart arrives at your table, a Maitre d’ lifts the lid off a silver-domed cheese platter to reveal Remy the smallest Audio-Animatronics character ever created by Walt Disney Imagineering. You are then able to interact and have your photographs taken with him. "Bon Appétit from Chef Remy" takes places four times a day, six days a week. As far as I am aware, he makes an appearance at 12.30pm, 1.40pm, 2.50pm & 5.20pm Monday - Saturday.
Like you, I think it would be absolutely fantastic if a Toy Story Character meal was introduced and we can only hope that this is being considered for the future.
Wishing you a magical trip!