For those occasions when the trailer becomes inspirational enough to sell you the film it's advertising, there's always some fantastic music composed for these things! * Prelude, by Pusher Music. Not only is it used in the trailer for the Transformers: Dark of the Moon, it just gives you that "Last Stand" kind of feeling in general. Love or hate TF 3, that trailer music was just epic. * Not originally composed for the trailer, but the use of "Welcome Home" by Coheed and Cambria for the 9 Official Trailer is enough to give you goosebumps so hard it HURTS. * On the subject of using the instrumentals of rock songs, the trailer for the remake of Clash of the Titans makes suitably epic use of the instrumental version of "The Bird and the Worm" by The Used. The trailer was much, much b