If you look at it from a non managerial and purely numerical standpoint, you are correct that a bankrupt SeaWorld (whilst not likely) is a possibility worth considering.
However, in reality, there are so many things that management can do to avoid this scenario. Whether that be debt restructuring, more agressive operational cost savings etc, the list goes on. SeaWorld will not go bankrupt.
The only way SeaWorld will go bankrupt is if management just sit there and take no preventative action.
What does a Sea World in 2020 look like to you?