This new PSP remake of IS will have a new opening and some graphics updates. There is no word yet if the remake will make it over to the US, but I'm sure it will. It also has been confirmed that EP will not be on the remake, it will be impossible to fit both games on the UMD. Though, the creator has stated he wants to do a remake of EP as well.
I do know that when this game hits shelves I'll be playing this game all hours of the night like Persona 3!