I never really thought about it before, but when you watch the film with Tartakovsky's style on your mind, it sticks out like a sore thumb! The way some of the action sequences play out and the choreography are just classic Tartakovsky.
The animation director was trying to get into Marvel Animation back in 2008, but was ultimately told to get a hold of Favreau, who happened to be a big fan of his work. After they met, Favreau brought him on board! In an old interview with AICN, Favreau said: