From what I've read of it, the end of the great cycle was roughly the equivalent of Y2K in Mayan culture, some of them thought it was the end of the world, some thought it was the dawn of a new age, and opinion varied all over the map in between...and I'm sure most of them could have cared less since it was far, far in the future for them.
Plus if they were so damned great as futurists, why didn't they foresee and halt their own social collapse, or see how the survivors of that protracted disaster could dodge out on the Conquistadors?