To be serious for a moment, I think Dean is exactly right.
Disney was very accommodating last year, but you have to remember that Central Florida took direct hits from three of the four hurricanes which hit the state. I'd guess they would try to work with you if you actually had to cancel because your employer cancelled your vacation due to a storm, but that might depend on a lot of factors.
If you are flying, the airlines are usually pretty good about allowing free re-schedulings.
Absent some kind of pre-negotiated arrangement, if you cancel at this late date, the points will go into "holding account," which is a really bad thing. I'd sure talk it over with them before making any decision that would put your points in holding.
But, as I said above, I don't think you are going to have that problem.