I THOUGHT I saw Toy Story 2, I know I didn't see Toy Story 3, and, honestly, that doesn't matter.
What matters is that parts of 4 are HYSTERICALLY CREEPY, not in the child inappropriate kind of way, but still creepy enough to add a decent amount of humor for adults that sit down and watch it.
So, it looks like we are getting back to the 80s and 90s where cartoons add things for parents and not just wine moms, single cat owning aunties, and children. There are actual jokes here that adults in the room will be entertained by, and that is all I ask for in a children's cartoon, throw something in it for the people that have to take their kids out to see it so it doesn't feel as much like a chore.