I've posted fan produced movie trailers before (He-Man, GI Joe) and I'm always amazed at how high quality they are. And how much they make me want to see those movies. Here's an example of a possible upcoming Green Lantern movie starring Nathan Fillion:
Or could it be that the format/formula for trailers is so fine-tuned that trailers make anything look entertaining? Oh, my fragile little mind get sucked in again!