And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. (Matthew 16:18)
If you find this list credible (and it's not the sort of thing any Catholic is obliged to believe), there could be more intervening popes between JPII's successor and this hypothetical Peter. Alternatively, Peter may actually be the same as the last one listed, since none of the popes except him are named, and even in his case the name might be an allegorical reference to his office. Without a strong sign from God, would any pope venture to name himself Peter II?
Nevertheless, let's hope that the College of Cardinals doesn't do what it sometimes does after the long reign of a strong pope. Namely, pick a very old man as a compromise candidate, while they take more time to deliberate the matter. God's will be done, but the world needs another strong leader like JPII.