The outerbanks and Wilmington area of NC are the most highly hit area for hurricanes (granted, they are not usually the devestating ones, but they are still the most hit).
Although, I have to say I absolutely love the outerbanks! it is absolutely wonderful there. But, having been there many times, I am not sure where Marriott would get the space. They would have to buy an awful lot of land in order to build a timeshare. Although, if they did build, I might just have to buy it!
When we were living in NC we used to go to the outerbanks in Sept every year. It was great, no one was around, no lines in restaurants. But, we almost weren't able to go one year due to a hurricane, but it hit 2 weeks before and took out all the steps to the beach, but the house was fine! When we would walk the beach we saw all kinds of "Condemned" signs on house. Lots of homes were destroyed that year. Prime reason not to build a timeshare there.