I was just listening to James Horner's Legend Of Zorro (track 11, The Train) and from 8:30 through the end it sounds like a completely different composer. After a minute or so it struck me; this sounds very much like a lot of the action stuff in Williams' Episode III. I proceeded to check out the orchestrator lineup and sure enough, "Conrad Pope" among others. Pure speculation of course, but it sounds so radically different from what I've come to expect from Horner, I find it hard to believe it'