Well, it is all a guessing game at best (for us on the outside of the secret writing committee and governing body)...
But I think it will eventually have to be dropped because it makes no sense to say the end is imminent to an event that occurred over 100 years ago.
I speculate that they will eventually (sometime after 2014) just stop mentioning this date in the literature - rather than denying it in print.
This is what seems to have been done with the long-held idea of the 7,000 year old creative days.