"But having the city come alive with any kind of sport is great. The fact that we're here getting to represent Bay area music at The Night Before is pretty exciting."
Because the band is not currently on tour, Hetfield joked about the set list.
"All covers, no. All Coldplay, not even that, no. We're going to be doing probably a best of, you know, when you're in a situation like this ... you know stadium, catchy, bouncy, and heavy, which we do," Hetfield said.
Coldplay will play the Super Bowl Halftime Show on Sunday with special guest Beyonce.
At the sound check for Saturday's concert, the band gave a few devoted members of their fan club a taste of what they can expect, playing classics like Master of Puppets, and Welcome Home) Sanitarium.
Hetfield also reflected on the recent passing of musicians such as David Bowie, Glenn Frey (of The Eagles) and Maurice White (from Earth, Wind, and Fire).
"It's always sad when brothers, musical brothers pass on - go on to the next gig or the next journey," he said.
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"They're dying of natural causes. Age, age-related stuff. That's better than hearing about a Kurt Cobain or a Layne Staley, something where they've inflicted that upon themselves."
But it was last December's death of Motorhead founder Ian "Lemmy" Kilmister that seemed to affect Hetfield the most.
"He single-handedly inspired Metallica to be Metallica. That was a tough one, a real tough one. The fact that he lived the life he wanted to and pretty much died doing what he wanted, that's key," he said.
- AAP