Now that the gamble paid off in spades, there should be no such qualms about the trailers for Guardians of the Galaxy Vol. 2.
The Guardians advertising method was very effective, so it should be more of the same for the sequel.
Credit has to go to the marketing department for realizing early on that approach could work and betting against the test screenings.
Watching the teaser again, it’s easy to see why some may have been uncomfortable with the footage (remember, this was before Guardians became a bankable brand).
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Marvel's Guardians of the Galaxy - Trailer 1 (OFFICIAL)