So, Guardians of the Galaxy is the latest Marvel Cinematic Universe release. It's the last of the current Phase of films prior to Avengers 2: Age of Ultron. It's done well, both critically and commercially. Surprisingly well, in fact. You see, Guardians of the Galaxy is a pretty minor comic franchise (rather more successful since the announcement of the movie). As a superhero team it includes no “big names”. Compare to the cinematic Avengers – Iron Man, Hulk, Thor, Captain America. Absolute A Listers.