I...Err...I'm not sure how I feel about this. Shocked is probably the best word.
The Prince of Persia trilogy is my favourite game series of all time, while Sands of Time is my favourite game period. Would I like to play another game like the old Prince of Persia? I'd love to. But the PoP trilogy is just fine the way it is. It began with an interesting premise, the second game developed the mythology further and the final tied it all up with a ribbon on top.
Why try again what you did with PoP 4 (except, you know, good). A new story with the same game mechanics.
Obviously I can't judge until I have the game disk in my console and I'm already throwing the controller across the room, but the term "kicking a dead horse" leaps to mind. We'll just have to wait and see I guess.