UPDATE: Disney will once again delay the release of Mayhem at the Mansion. Guest relations wasn’t able to give a new release date. The reason for the delay was issues with MyMagic+ that started last night and went into this morning. Below is the original story.
Disney has announced that the Mayhem at the Mansion app will become available for download (again, after pulling it from the store because they weren’t ready for the first MNSSHP) on September 9. You can read more about the app here.