According to a recent Disney blog update addressing their seasonal events, Walt Disney World announced the cancellation of Mickey's Not So Scary Halloween Party for this year.
As you can see in the statement, H2O Glow Nights at Disney’s Typhoon Lagoon will also be canceled for 2020, and refunds will be available for those event tickets.
Along with those cancellations, they outlined a 'modified' EPCOT International Food & Wine Festival. It will be their longest fest yet, beginning on July 15th. The "Eat to the Beat Concert Series" will not be a part of this year's festivities.
In regards to the winter events including Mickey’s Very Merry Christmas Party and the EPCOT International Festival of the Holidays, they will keep monitoring whether those are able to happen later this year.