If there’s one element that can make or break a film, outside of its overall quality, it has got to be the trailer. A trailer (read: most times created by a company not associated with the studio producing it) can make the very worst film look like a billion dollars and conversely undersell something that is genuinely a good product. Case in point. The marketing for DreamWorks’ upcoming film The Croods hasn’t been, shall we say, doing the film any favors. To be fair this is a tough one to market. It’s not John Carter hard but still, if you asked anyone on the street if they wanted to see…