For those that still think there is a chance of Rammstein playing Mayhem Festival, in 2010 Rammstein agreed to play a Summer festival in the Netherlands called Pinkpop. The cost for Rammstein to play that festival was 1.5 million Euros, equaling 1.85 million dollars. That is around how much it would cost per date for Rammstein to play Mayhem Festival. The band has also gone on record saying they refuse to play various South Eastern states (some of which Mayhem Festival goes to) because of how much protest they get and when they played said states in 2001 they even received death threats.
05/24-05/26 - Maryland Deathfest
06/01 - Bolt Thrower