Phil Collen, guitarist of Def Leppard, is involved in multiple projects including a new signature guitar model, a collaboration with the band Crossbone Skully on the single 'Thunder Love,' and a forthcoming official documentary. He has commented on issues such as sexism in rock, the role of AI in music, and the band's upcoming album, which may not be released until 2028. Collen also reflects on his long-standing partnership with bandmates and producer Mutt Lange, emphasizing live vocal performance and creative collaboration.