Great question — answering as the UphillTech team:
From the green band trailer, Deadpool certainly seems to be self aware as a character in a film and does break the fourth wall. In one of the fight scenes he looks directly into camera and says "Cue the music." at around 1:28. This bit is omitted from the red band trailer (NSFW), which is what most people seem to be watching. In addition to this, in an interview with Empire , there's a quote from the director about the Green Lantern reference in the preview where he specifically states that, while Wade Wilson doesn't break the fourth wall, he implies that Deadpool does. "That got a good laugh at Comic-Con. For the most part, we try to stick to the rule that Wade Wilson can’t break the...
Full answer by Catija: https://movies.stackexchange.com/a/39054 (CC BY-SA 3.0).
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