Research :)

From looking at a variety of comedy trailers I have acquired that the majority use a voice over, both to bridge gaps and to help introduce plot and characters. This voice is more than likely male, yet soft and deep, using short sentences rather than long monologues of speech. It is also notable that most include the same theme of music - light hearted and fast paced, to show the audience that the comedies are quick witted. There are also a large amount of shots that, although they do not give the entire plot away, give an insight into the characters and the general gist of the film. The scenes of the trailers are also ran in chronological order, with few jumping around in time, this helps to create an enigma as the relevance of the scenes, and the action accompanying them, is unknown to the audience.
Also from my research, i have noted that many narrative theories apply to the action-comedy genre. Aristotle's unites is an underlying theory in all films, unless the main character in the film dies or, perchance the ending is not happy. The main theory applying to our specific genre is Todorov's theory of equilibrium. He stated that a story follows a pattern of equilibrium, where all is calm, disruption to cause disequilibrium then a renewed state of peace where the characters, commonly the protagonists, have restored the peace. To a certain extent, and relevant to our piece, we can include Propp's theory of characters, as we have the heroes, the helper, the villain and, in a sense, the dispatchers in the form of the heroes parents.