[dagmx]

Are you simply talking about the shading style? Because otherwise there's nothing similar in style between Cloudy with a Chance of Meatballs and any Pixar film of that generation.

Cloudy with a Chance of Meatballs was very much pushing animation style dramatically at the time and brought a lot of Fleischer, UPA and Looney Tunes animation into 3D for the first time.

Regarding your point of Marvel agreeing to it: Sony still owns the rights to Spider-Man for a lot of domains. That was purely a Sony film with little to no Marvel input. Source: I worked on it.