Ronny Munroe – Vocals for Metal Church
Bjorn Luna – Bass for Chrome Division
Lucas Metcalf – Vocals for Sound and Fury
Schmier – Bass and Vocals for Headhunter and Destruction
Jon Oliva – Vocals, Piano/Keys, and Composer for Jon Oliva’s Pain, Savatage, Trans Siberian Orchestra, Dr. Butcher
Veronica Freeman – Vocals for Bendictum
Lars Chriss – Guitar for Lion’s Share
Arjen 'Ayreon' Lucassen – Writer, composer, musician for Ayreon, Star One, and Stream of Passion
Rat Skates – Former Drummer for Overkill
Metal Mike Chlasciak – Guitar for Sebastian Bach, Painmuseum, and Halford
Chris Boltendahl – Vocals for Grave Digger
Tobias Sammet – Vocals and composer for Avantasia and Edguy
Rob Cavestany – Guitar for Death Angel
Dirk Schlaechter – Bass for Gamma Ray