Arthaus Musik will release this Blu-ray, according to one of its tweets today. Strange way to make this info public as there's nothing related to this on their official website. But there's a short video introducing the new release (no date or cover yet).
This is a live recording of the Solti Centennial concert that took place in Chicago on October 21, 2012. Angela Gheorghiu was joined on stage by Rene Pape, the Solti Accademia alumni and the World Orchestra for Peace conducted by Valery Gergiev. See some photos here