James Hetfield says there is no reason for any ill feeling to remain between him and ex-band mate and Megadeth mainman Dave Mustaine.
Mustaine was famously kicked out of Metallica in the early 1980's but Hetfield insists it is all ancient history with each man making their own journey to the point in their lives where they sit today.
“There's no reason [for things] to not be good [between us]” he said.
"At this point, we've all freakin' fell off the wagon, we've all gone into the ditch, we've all gotten back on track, we've all learned from our stuff. And at the end of the day, it's just journeys — everyone is doing a different journey — and why would you hold a grudge with someone or vice versa?"
In an interview with WTF with Marc Maron podcast Hetfield explained the catalyst for the historic 'Big 4' shows the band took part in alongside fellow thrash legends Megadeth, Anthrax and Slayer.
"It really started [when Metallica was inducted into] the Rock And Roll Hall Of Fame [in 2009]," he commented.
“Getting nostalgic and thinking, 'My God, look at all the people that have helped us along the way, and look who are still around. Let's say 'thank you' to them.' And so the 'Big Four' was kind of that thing. We're all still playing after thirty… whatever it was… thirty-two years.
“Let's go do a gig together. I mean, why shouldn't we? Let's celebrate the fact that we're still alive and playing music that we love. And I think the other thing was, the New Wave Of British Heavy Metal. That's all I ever hear about. NWOBHM. Blah blah blah.
“What about the 'Big Four'? No one knows the 'Big Four'. Come on, let's make it known. Let's make some history here, and let people know, and put a mark there that, hey, the 'Big Four' was, and is, a force to be reckoned with.”