"Eagle Rock Entertainment has revealed that they have delayed the upcoming high-def release of 'Queen Rock Montreal' two weeks to December 4th. Production issues was the reason given for the delay, but fans will be happy to know that this release is packed with additional content not announced previously.
In addition to the newly remastered versions of the Montreal and Live Aid concerts, the release will also include an audio commentary with Brian May and Roger Taylor. Additionally, the release will have rehearsal footage for Live Aid, a newly released band interview, media coverage of the historic event, and a "Before & After" video restoration comparison."

Source: http://www.blu-ray.com