Toy Story 4 has a subtle reference to the Pixar Theory. 1 / 10
The theory claims that every Pixar movie takes place in the same world. 2 / 10
However, the Pixar Theory doesn't stop with Pixar movies. 3 / 10
The first Toy Story featured a toolbox from the fictional company Binford Tools. 4 / 10
That connects Toy Story to the '90s sitcom Home Improvement, which featured Binford. 5 / 10
Through a chain of guest stars and cameos, that show is linked to the series St. Elsewhere... 6 / 10
That series is the basis for the Tommy Westphall Theory, which connects these worlds to one child. 7 / 10
That theory connects hundreds of shows and movies through crossovers and shared elements. 8 / 10
Toy Story also crosses over directly with Kingdom Hearts, which combines Disney and Final Fantasy. 9 / 10
Through Big Hero 6, Kingdom Hearts and PIxar even connect to the Marvel Universe. 10 / 10