Tror det är Aska productions som ligger bakom bokningen så det lär dyka upp info på deras hemsida när biljetterna släpps: http://www.askaproductions.net/
Most of them (if not all?) are filmed by Walter Morgan who worked for and toured with the band through out the years... So I think most of them are first generation copies filmed with a video camera.
You can buy a special "december-ticket" right now (a 3-day ticket + the 4th warm-up day + a raffle with some decent prizes)... The "normal" tickets will be available in January. You buy them through:
http://www.swedenrock.com