Had been a while since I ran through DMH but I refreshed my memory today.
When you zone in and when you port into the boat for the last fight, at least on Unchained mode, it plays the first bit of The Dreaming 'Ere the World Crumbles, which is from the original soundtrack. If it's not The Coast of Ardashir or this then I don't know.
http://youtu.be/ey2neAUBq4g
http://www.youtube.com/watch?v=INsmcwnha-k
the music that plays for me is what is the first track in this video.