A non-refundable credit toward next time? 
Another thing to keep in mind is, even if you CAN get into the park a lot of people missed their ADRs because it took MUCH longer to get into the park than anticipated. Plan to be there WAY ahead of your ADR so you don't get caught in the parking lot (or in line for the monorail, bus, or boat, or bag-check queue, or the front of Main Street with 20 billion people in front of you) with no hope of reaching Cindy's (or any other ADR) on time. In that instance, your deposit will not be refunded.

Another thing to keep in mind is, even if you CAN get into the park a lot of people missed their ADRs because it took MUCH longer to get into the park than anticipated. Plan to be there WAY ahead of your ADR so you don't get caught in the parking lot (or in line for the monorail, bus, or boat, or bag-check queue, or the front of Main Street with 20 billion people in front of you) with no hope of reaching Cindy's (or any other ADR) on time. In that instance, your deposit will not be refunded.