We don't have any special knowledge of the hurricane schedule for any year.
A specific Hurricane usually starts off on the coast of Africa, and forecasters will start speculating on landfall 7-14 days in advance. As the storm approaches the US the location of landfall gets narrower. Orlando is relatively safe from a direct hit. Once a hurricane makes landfall it loses energy. By the time it travels 100 miles to reach Orlando the storm's strength is much less. Hurricanes mostly bring rain to Orlando.
Although hurricanes have caused the Florida theme parks to shut down for a day or two in some years in the past, this has NOT happened most years.
Mid-September is historically the slowest time at Walt Disney World. The biggest reason why crowds are low is that children across the country are just starting school.