From the blog My Napoleon Obsession, an update on the as-yet-unfilmed movie "Napoleon and Betsy." Scarlett Johansson is out and Emma Watson is in as Napoleon's supposed love interest.
Confusingly, this is not the same movie as "Betsy and the Emperor." That one is supposed to star Al Pacino, and is based on a book by Staton Rabin.
If you want to read up on the real Betsy Balcombe while you're waiting for the films to (maybe) get made, she wrote a book called To Befriend an Emperor.