While there is some controversy as to Pretrus Romanus being in the original prediction, you're right, he IS the guy who completes Malachy's prophecy.
And people who believe that ARE the folks who prove the old adage, "There's a sucker born every minute"
I hope such folks have been saving their nickels and dimes so they can buy all the books and DVDs the same "insightful prophecy experts" who have said the same thing at least three times since the sixties are busy rushing to press now that they know what name stick into the appropriate blanks they left in their manuscripts.
After all, there's a new Ferrari out that the better known experts will have to sell a lot of books and get a lot of fat speaking fees to add one of those babies to their collection.