In other Metallica news, earlier this month drummer Lars Ulrich hinted that the band are thinking about new music – but there's nothing concrete on the way just yet.
"Obviously, ultimately, we like the seesaw element of it, the balance, but still, it’s like, 'Let’s get on with it. Let’s go play some shows. Let’s hope that we can get through the next few months without anybody going down, keep our fingers crossed. Let’s be cautious, let’s be respectful of the situation out there.’
"And of course there’s new music coming, there’s always new music coming,” he added. "It keeps us alive, you know that… Listen, I wish I could… I mean, of course there’s new music, but there’s nothing cohesive. There’s not a story, there’s not anything to really back it up yet.”