Heavy Rain Sequel Revealed? Madison Paige signs her book

Upon completion of the game journalist Madison Paige holds a book signing session for her book 'Heavy Rain an investigation on the Origami Killer' at a book store, someone calling himself Vincent says,"You need a better adversary, someone more ferocious", Madison looks up and he is nowhere to be seen, does this suggest a sequel is in the offing? (Apologies for the clarity, I've videoed straight from the TV screen)