Making trailers is an art in it's own right. Yes, Guardians of the Galaxy looks awesome but this trailer, made from the first 3 Star Wars movies by 'the Unusual Suspect', instantly makes me want to go watch those again too.
Here, in case you haven't seen them are the trailers for Guardians of the Galaxy ( 1, 2). I suspect that you could use them as a template to get people to watch, or re-watch any number of things:
Sign up here with your email