If their past record is anything to go by, they will be there. Not to mention, there are only 300 people at the venue. 150 winners with 1 guest each. So it would make perfect sense them being there. If people who know AC/DC think back to MoneyTalks and the video that went with that, they will remember the small, but very genuine crowd.
I really do not expect them to be there. But hell, I love AC/DC so much, it's an honour to be part of their video wether they are there or not. I will not be disappointed if they arn't but overwhelmed if they really do perform. The way the editors of the competion have worded it, it seems they want a genuine crowd there. And to have a genuine crowd, they are going to need a genuine AC/DC. I couldn't imagine us lot cheering, headbanging and screaming for AC/DC when its just played to us from a recording.
Not to mention, the fact that it is such an intimate gig, and that they haven't done an album for 8 years suggests they may be doing this properly. They arn't the kind of band to not show.
-Carma