They have a minimum of 30 days to reply to ROFR before a contract can closed, but legally they have up until the contract says it will closed. Essentially, if Disney has not replied by the closing date, they have waived their ROFR and closing can progress. In reality, none of the brokers and title companies want to proceed without an actual reply from Disney, which is why almost every broker sets the closing date anywhere from 60 to 120 days, to give plenty of time to receive the ROFR waiver and complete estoppel before closing.