Uh, it sounds VERY MUCH like Silvestri's previous scores. If you can't tell, then you haven't listened to all of his scores. There is very little that is original in this score. And the theme is nothing spectacular when compared to The Mummy Returns, Judge Dredd, Eraser, Volcano, Long Kiss Goodnight, etc.
This score is NO MORE ORIGINAL than POTC, so I wish people would stop comparing the two.