K.M., What do you mean? They do that all the time for video games (and video game trailers) - using Williams' music as a basis, they then use synthesizers or whatever to elaborate on the original themes and make new music to go with the game. Rogue Leader, for example... Anyway, in the trailer, look for "For the Galaxy's Most Wanted" to appear. There's some percussion and voice-stuff that blends pretty well into some more obvious Williams material that comes after. Then with the appearance of the Bounty Hunter logo at the end there's some more percussion and string, but nothing too complicated, so it's hard to tell if it's a live orchestra (thus, more likely to be J.W.) or just synthesized.