One thing you can be sure of is that the ships will NOT be in port in the hurricane is definitely headed in that direction. The safest place for any ship is at sea during a hurricane. In fact, with Hurricane Charley, PC ordered the last remaining ship to leave early due to the approaching weather.
Since hurricanes are so unpredictable, it is highly unlikely that the Captain, or anyone at Disney, can give you a revised itinerary more than a few hours prior to your boarding. Revised ports will also be subject to damage received at potential ports of call. Good luck on your trip.