In the 50's and 60's, super hero fare was starting to fall out of style. To accommodate different tastes, guys like Jack Kirby started writing these epic space stories. The original Guardians of the Galaxy was part of that. However, come the 60's and 70's and super hero stuff is back in the limelight because of new characters. As such, the space stuff took a back burner (though some of the VERY best Fantastic Four and X-Men stuff deals with it). Well back in the early 2000's, Marvel decided to take a crack at it again and mix-mashed a bunch of Silver Age villains (Gamora, Drax, and Groot) together with some older heroes (Star-Lord, Rocket Raccoon) and basically play it like the Odd Couple meets the A-Team. It kind of took off after that and had a decent run.To people who have seen Guardians of the Galaxy. Is it a Marvel universe movie? Because I know its made by them but it doesn't seem like it should really tie in with that.
So yes... this space stuff is VERY much Marvel and a lot of it is actually pretty cool. Considering the smash it already s (95 mil on opening day IN AUGUST), we're probably going to see more space stuff. Probably get some Nova Corp stuff next.