Megadeth‘s Dave Mustaine has said that he hopes to one day work with Metallica‘s James Hetfield again.In an interview with Andrew Daly of Vinyl Writer Music, the Megadeth frontman spoke about his approach to songwriting and his longevity in music.“Well, I have to think that my longevity might just be stubbornness,” he said. “I have been secretly hoping there’d be a day where James [Hetfield] and I can write together again.