If you've been hoping and praying that the Big 4 will soon be playing a full U.S. tour, you might want to lower your expectations and be happy with that DVD of the Sonisphere show from Sofia, Bulgaria. In a recent interview with UK's Classic Rock magazine, Slayer guitarist Kerry King said he can't imagine Metallica, Slayer, Megadeth and Anthrax will stage any more Big 4 shows.

“If you look at how much work went into making it all happen in the first place, then I really doubt we can do the same thing again,” he said.“You had four headlining bands touring together and that takes so much organizing."

King continued: "I know there are some parts [of North America] where [fans are] angry not to have gotten the chance to see it. The Bay Area will probably never forgive us. And we could go on and on doing it for ages. But I honestly doubt we can get our schedules to coincide like that again.”

Slayer are writing songs for the follow-up to 2009's 'World Painted Blood.' Meanwhile, guitarist Jeff Hanneman, who spent the past year recovering from a near-lethal spider bite, is still recovering from the infection. He hopes to be back in the band by the album's tentative release date next summer.