The teaser definitely is getting good to great buzz, however, I was a bit disappointed to see that it's the same trailer as Comic Con with a couple of new shots here & there, they did the same thing with Godzilla, it strikes me as kind of lazy, but I guess it's easier for them to have the trailer alrdy cut & done, and just touching up the CG.
Anyway, I had already seen it in bootleg quality and I kind of regretted it, because otherwise, I would have been really blown away, since I've already seen it before, I'll just say that it's a very effective TEASER trailer, those already writing it off or saying "it doesn't do anything for me" are kind of missing the point here, as with most teasers, this is basically a montage of images out of context, with a good chunk of the trailer dedicated to showing off who the characters are, otherwise, you can't really judge the movie in any form except that Pratt looks great, the humor looks good, although it probably won't be for everyone considering it's Gunn, but at least, there will be plenty of spectacle for those who don't enjoy that part.