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.
These are a little vague, and should be taken with a grain of salt.
RE: 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 look at the original text did Jesus mean to say to Peter that he was the 'Rock'? (Petros vs. Petra)
There are many questions regarding what Jesus said to Peter. Petra VS. Petros, Armaic VS. Greek, Protestant view VS. Catholic view etc...
If you perform a web search on Petra and Petros you'll find a wealth of information (and mis-information) on the subject. Was Peter designated by Christ to be the first pope or was Jesus saying you are, "You are Petros (masculine), and on this (the Revelation to Peter that Jesus was the Christ) Petra (feminine) I will build my Church.
research this:
http://www.jerusalemperspective.com/Default.aspx?tabid=27&ArticleID=1859
http://www.1shiloh.com/Articles/FAQ/FAQ%20Articles/Rocks%20and%20stones.htm
http://www.icubed.com/~rpoe/hatemail.htm
http://jmgainor.homestead.com/files/PU/Scr/hebm.htm
http://lists.ibiblio.org/pipermail/b-greek/2003-May/025444.html
http://www.bringyou.to/apologetics/a64.htm
and many more links if you search petros petra on google.