What prophecies? Funny how everyone was having conniptions when Benedict was chosen, as all the 'prophets' were proclaiming he'd be the last one before the Apocalypse. I'd even heard looney-tunes craziness that he would turn out to be the Anti-Christ. Yeah, not so much.
If you believe the Bible, not even Christ knows the day and time of the end of the world, only the Father. So all these doomsday predictors are at best nuts, and at worst false prophets and agents of Satan.
I think he's doing a good thing. John Paul II also had plans to retire, but he died before he could announce it. At 85 y/o, Benedict is tired and frail. He should be allowed to live his remaining years without having to deal with the rigorous duties of the Papacy.