Pulling off the biggest box office surprise of the year, James Gunn ‘s August tentpole Guardians of the Galaxy has become the top grossing film of the summer in North America, outsmarting the likes of Transformers: Age of Extinction and The Amazing Spider-Man 2 . The Marvel Studios and Disney movie is expected to finish Saturday with a domestic total of roughly $246 million, eclipsing the $243.3 million grossed by Age of Extinction .
