Hi Shaggy. Probably not that dark for you and I but the movie is aimed at young children and they may be a bit unsettled. Mostly darker characters than the other 3. It was even a little creepy for me for that type of movie.
Just saw it with the whole family. I could see it having some dark tones in one maybe 2 scenes but over all it wasn't dark. Pretty dang good. Loved everything about the movie. Entertaining through out and my 2 year now has another TS movie we can watch 20 times over and over when it comes on Blu-ray. He's a Toy Story fanatic!
I really hope they continue the Toy Story franchise with more movies. I know they plan on doing a few Toy Story spin offs on Disney+ and possibly short films, but I still hope we see a few more feature fiims. Toy Story 10 wouldn't be bad.