Just want to tell you that the start of Oblivion would be 3E433, not 3E453 as in the recently released FAQ. There is a mistake in the A Brief History of the Empire. Check this thread for more information. It makes the Oblivion starts after 6 or so years after Morrowind events.
And in the trailer he also distinctly says that these are the last days of his life too. So either it really was only said for the trailer or he is really well in tune with the prophecies.