My understanding of
travel insurance is that cancelling for a reason such as this would not entitle you to a refund. The policy that
DCL sells covers cancellation for the following reasons:
-Injury or medical condition
-Some outside condition which prohibits travelling (jury duty, your house burns down)
-An accident on the way to the port/airport
-weather causing you to be unable to fly to the departure port
-Military recall
It specifically does not cover:
-pre-existing conditions
-change of plans due to business, lack of passport, being detained by Customs
-government restrictions
-terrorist acts
-financial default
-strikes, natural disasters
Having said all that, I would not worry about this storm. At this point, it is still in the Pacific. A lot can happen between now and Sunday as far as it weakening, and even if it doesn't weaken, it is still almost 2000 miles from the Bahamas. It's entirely possible, if not probable, that it will not impact Sunday's cruise at all. If it does, the ship will keep away from it.
We sail during hurricane season (Sept/Oct) just about every year. The vast majority of the time, we've had no problems, even when storm forecasts have put the storm right on top of where the ship was scheduled to be. In my experience, the forecasts, especially this far away, tend to be wrong as often as not. This particular storm still has to cross Central America, and it's hard to predict how much strength it will retain in doing so.
My advice would be to go, and not to worry about the storm. Keep in the back of your mind that the ship may be re-routed, but in all likelihood, you'll have no problems.