BPEarthwatch has a great analysis of ISON and the possible coming meteor impact(s). I believe that something is going to happen and quite soon. If a meteor shower were to come down on the N. Atlantic, and especially hitting some cities, the effects will be devastating, and could possibly set off the economic collapse. But certainly, the physical damage in cities and from Tsunamis would be horrendous!
In the video, BP suggests that his could possibly be a fulfillment of Rev. 18, where the mighty angel throws a great stone into the water, and says, "So will Babylon, the great city, be thrown down, with violence, and will not be found any longer" (Rev. 18:21).
Another thing I find persuasive is that there was a prophecy given by St. Hildegard. Scripture tells us to not despise prophetic utterances (1 Thess. 5:20). In this vision, she tells:
Before the comet comes [Nibiru aka Planet X?], many nations, will be scourged by want and famine. The great nation in the ocean [USA?] that is inhabited by people of different tribes and descent will be devastated by earthquakes, storms and tidal waves. It will be divided [New Madrid Fault?] and, in great part, submerged. The comet will by its tremendous pressure force much of the ocean and flood many countries, causing much want and many plagues. All coastal cities will live in fear, and many of them will be destroyed by tidal waves, and most living creatures will be killed, and even those who escape will die from horrible diseases. For in none of those cities does a person live according to the Laws of God.”
As more and more people are coming to believe that America is the Babylon of Apocalyptic literature, Hildegard's prophecy seems to fit with all that's happening. Will it come to pass? As it's said, "Time will tell." Indeed. Whose side are you on? Where will you go when you die? If you want to make sure that you are with the LORD and in heaven, turn to God for the forgiveness of your sins, and surrender the Lordship (ie control) of your life to Jesus, and ask him to come in and save you. God knows your heart (Rom. 10:9,10).