If you really look at the prophesy; you might notice that Pope Benedict is actually 'Petrus Romanus'

The reference to Petrus Romanus is valid for ALL the popes; the Pope being the representation of the original apostle Peter; the one on whom the church has been built. There is not going to be another pope after this one. For something like 24 or 26 years at least?

It is also indicated in other prophesies that this last pope will be killed by soldiers.