re: GOTG and Why Superhero Movies Shouldn’t Be Afraid to Get Colorful

There's a fear of cheesiness, innocence, child-like images, etc.

I feel the Avengers and Iron Man specifically had a lot of color. Only the Cap movies have lacked color, and even that's a stretch. Cap 1 was done on purpose to look vintage, not to look darkity dark or to tone down the happiness with color.

See Asgard as well.