It seems to be the thing to do these days in Hollywood: create a shared universe. But one director who is employed by one of the biggest universes out there right now seems to have some beef with the whole concept and calls them out. Is he zeroing in on Sony and Spider-Man?

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Guardians of the Galaxy director James Gunn took to his Facebook page on Friday to give his opinions on shared universes and why he thinks that they don't always work.

In the post, Gunn said that he is "a little worried about the numerous shared universes being planned by the studios, without having a strong base film to grow from - or in some cases, NO base film to grow from."

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"Star Wars had the original Star Wars, the Marvel Universe had the original Iron Man, the Dark Knight series had Batman Begins, even movies like Transformers and Twilight - these were movies audiences loved, and the audiences demanded more from these characters."

While Marvel's universe has worked well, it has also sprung out other ones like it, including Warner Bros./DC starting their own with Batman v Superman and Universal with their monsters. One of the biggest examples, Spider-Man and Sony, is probably a big target that the Guardians director is gunning for.

They have taken one character and are trying to create a universe as deep as Marvel and so far it hasn't worked. As they tried to cram characters into The Amazing Spider-Man 2, it was received with critical and fan backlash and a low box office number for the studio.

Gunn may be right about shared universe, but for the time being, it isn't something that will go away until more of them fail.