Anthropocentrism

Yes, it is pretty obvious why every shared universe is anthropocentric. After all, almost every movie thus far took place on Earth. However, this issue comes to life once we discover that the Universe is actually quite big and quite populated.

Guardians of the Galaxy had this amazing chance of bringing us the Star Wars  of comic book movies. It wasn't, since the main character is an Earthling. Furthermore, the species are all humanoid "“ but this will change once Ego the Living Planet arrives.

However, the issues still remain for all the shared universes, with the Earth being at the center of it all. In the comics, there are numerous and awesome alien species. And I do wonder why nobody makes a movie about them.