I'm a comic-loving person (seriously, I have an IKEA Billy shelf full of them. And yes, I am bragging.)
In all those comics, plus the loads more I have read ...... let's just say "at the library", ok? ... the Guardians have come up an astonishing rare amount of times. So, at last, I am on almost equal footing with non-comic fans.
That this is being made as a movie is akin to those sports films about that one baseball player from the 50s .... except that no-one remembers him, only few people know about him broadly, and no-one has any goddamn clue about how the story will play out or HOW IT WILL END.
It's a bold step for a movie/comic firm to go off-checklist and not make the comic book film adaptation about the guys that everybody knows .... but about some rather obscure, "small-time" heroes. This is an exciting thing. It opens up almost the entire archive of Marvel heroes for film adaptation.
Comic fan? Not a comic fan? You should go see this.
Why?
Because by doing so you tell Marvel & Co. that audiences want a more "diverse" hero roster. It will be possible to adapt more "risky" (read "financial unappealing") comic books. This is a good thing because - and here you need to believe the comic consoisseurs - there is a lot of good, interesting stories in there (for everyone), which you, as a movie goer, want to see adapted.
TL;DR go see this movie.
