There's a very strong camp factor at work in the trailer. That's pretty clear by tagging out the trailer with Blue Swede's "Hooked on a feeling". And if that wasn't obvious enough, then casting Chris Pratt as Peter Quill/Starlord makes it abundantly clear that this is a movie that isn't taking itself completely seriously. Pratt's known more for his comedic chops than for being an action star... Zero Dark Thirty excepted.
Going into this I had ZERO exposure to Guardians of the Galaxy. And I was wondering if this would be the point where I might need to tap out with the Marvel Cinematic Universe films. But I think that after seeing the trailer I'm more likely to go see this movie.