First off, the last pope is not supposed to be Benedict or whatever the hell his name is, it's John or Paul or something. And it was Nostradomus that said it.
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666 is not just the number of The Beast, but it's also associated with the anti-christ, and the anti-christ is supposed to be The Beast anyway.
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It wasn't MASUR, it was MABUS, and again, it was said by Nostradamus. Many people believe it is an annogram of osaMA Bin laden and BUSh. I capped the "B" in Bush and Bin laden because the "B" in both of their names would be the link between them if it were true.
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Solar storms would only knock out the main generators to cities in certain areas of the world, it would take one HELL of a solar storm to cause outages on a global scale. Not to say that it isn't possible. The radiation from the sun could eventually break through the earth's atmosphere, causing a massive ultraviolet radioton abundance, which would lead to many people getting skin cancer and badly damaged eyes. This summer we are supposed to be hit by a massive solar storm, but it's not like it hasn't ever happened to the planet before. I saw that show Harry, it was a huge IF show, kinda like a documentary on what COULD happen, but not something that neccessarily will.
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The Y2K Bug is like this, if you had read my statement right. I said that this is most likely another rumor that was spread through those B.S. spam mail messages, just like how the Y2K Bug began.
Eventually, the best place you could survive would be underground, but even that is an uncertainty, as humans have come to be too privelaged and spoiled by the tools that have been invented. Most would die just from not knowing how to survive like our ancestors had thousands of years ago. Because we would almost literally be thrust back into the times of primitive man, hunting, scavenging, building fires by hand, etc. But enough could theoretically survive to continue the human race.
As for the war thing, as SPLATT said, it is theoretically inevitable. Humans have waged wars on each other from the beginning. We all have a deep seated instictive hunger for power, wealth, and control. As to become the "alpha", so to speak. But others seek the same things, so clashes are bound to happen between two or more forces at one point in time or another. With as many nuclear weapons as there are in the world, a setting much like the story of Terminator could be a possiblity as long as we remain dependant on computers. But it would be unlikely for enough humans to get a quick enough warning as to survive the coming planet-wide devastation that would occur.
How the world ends is, at this point in time, up in the air. Anyone can come up with a scenario of any kind with their imagination. And a lot of people are just gullible enough to believe it. People have become so gullible that a good percentage of the world has lost it's individuality and spirit, causing many people to become just like the rest of society, conforming to the pressures of what others think things SHOULD be, instead of being themselves and appreciating the fact that they are who they are, they are what God or whatever Being there is, made them, and that's how they should be, and not how everyone else is. THAT, is the true downfall of humanity: Conformity, Indistinguishablity, Reliance, Gullibility, Ignorance, Greed, and many other things.