The fourth movie in the franchise, featuring Tom Hanks and Tim Allen, has a wealth of hidden gems ready to be uncovered, particularly in the antique shop where part of the movie is set.
Speaking exclusively to Digital Spy at the Toy Story 4 premiere, producer Jonas Rivera said: "This is the mother of all Easter egg films because we had to fill that antique store.
"My favourite Easter egg is, we have a tradition of putting the Pizza Planet truck from the original Toy Story in all the movies – it's in all of them and it's in the best spot ever.
"I don't know if I want to give it away. Should I? OK. It's not even a physical version of it. It's a tattoo on somebody so look close... and maybe it's the carnival worker... look close!"
Producer Mark Nielsen added: "There is literally something from every movie Pixar has ever made in the background in this movie.
"That antique store is a wealth of it, so we hope it's rewarding to all the people that love Easter eggs."
Jonas previously confirmed to Digital Spy that eagle-eyed fans might also see a teaser for Pixar's upcoming film Onward.
"Duke Caboom was in Jack-Jack's crib in Incredibles 2 and, yes, I won't spoil it, but you'll see a little nugget of Onward somewhere hidden in Toy Story 4," he said. "It's really fun."
Toy Story 4 will be released on June 21.
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